[PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Viresh Kumar]

Long back 'bool' type used to be a typecast to 'int', but that changed
in v2.6.19. And that is a typecast to _Bool now, which (mostly) takes
just a byte. Anyway, the bool type is implementation defined, and better
we don't assume its size to be 4 bytes or 1.

The problem with current code is that it reads/writes 4 bytes for a
boolean, which will read/update 3 excess bytes following the boolean
variable (when sizeof(bool) is 1 byte). And that can lead to hard to fix
bugs. It was a nightmare cracking this one.

The debugfs code had this bug since the first time it got introduced,
but was never got caught, strange. Maybe the bool variables (monitored
by debugfs) were followed by an 'int' or something bigger and the pad
bytes made sure, we never see this issue.

But the OPP (Operating performance points) library have three booleans
allocated to contiguous bytes and this bug got hit quite soon (The
debugfs support for OPP is yet to be merged). It showed up as corruption
of the debugfs boolean symbols, where Y were becoming N and vice versa.

Fix it properly by changing the last argument of debugfs_create_bool(),
to type 'bool *' instead of 'u32 *', so that it doesn't depend on sizeof
bool at all.

That required updates to all user sites as well in a single commit.
regmap core was also using debugfs_{read|write}_file_bool(), directly
and variable types were updated for that to be bool as well.

Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---

V2->V3:
- Moved a bug fix in a separate patch 1/2, so that it can be backported.
- Added Ack from Mark.

 Documentation/filesystems/debugfs.txt      |  2 +-
 arch/arm64/kernel/debug-monitors.c         |  4 ++--
 drivers/acpi/ec.c                          |  2 +-
 drivers/acpi/internal.h                    |  2 +-
 drivers/base/regmap/internal.h             |  6 +++---
 drivers/base/regmap/regcache-lzo.c         |  4 ++--
 drivers/base/regmap/regcache.c             | 24 ++++++++++++------------
 drivers/bluetooth/hci_qca.c                |  4 ++--
 drivers/iommu/amd_iommu_init.c             |  2 +-
 drivers/iommu/amd_iommu_types.h            |  2 +-
 drivers/misc/mei/mei_dev.h                 |  2 +-
 drivers/net/ethernet/chelsio/cxgb4/cxgb4.h |  4 ++--
 drivers/net/wireless/ath/ath10k/core.h     |  2 +-
 drivers/net/wireless/ath/ath5k/ath5k.h     |  2 +-
 drivers/net/wireless/ath/ath9k/hw.c        |  2 +-
 drivers/net/wireless/ath/ath9k/hw.h        |  4 ++--
 drivers/net/wireless/b43/debugfs.c         | 18 +++++++++---------
 drivers/net/wireless/b43/debugfs.h         |  2 +-
 drivers/net/wireless/b43legacy/debugfs.c   | 10 +++++-----
 drivers/net/wireless/b43legacy/debugfs.h   |  2 +-
 drivers/net/wireless/iwlegacy/common.h     |  6 +++---
 drivers/net/wireless/iwlwifi/mvm/mvm.h     |  6 +++---
 drivers/scsi/snic/snic_trc.c               |  4 ++--
 drivers/scsi/snic/snic_trc.h               |  2 +-
 drivers/uwb/uwb-debug.c                    |  2 +-
 fs/debugfs/file.c                          |  6 +++---
 include/linux/debugfs.h                    |  4 ++--
 include/linux/edac.h                       |  2 +-
 include/linux/fault-inject.h               |  2 +-
 kernel/futex.c                             |  4 ++--
 lib/dma-debug.c                            |  2 +-
 mm/failslab.c                              |  8 ++++----
 mm/page_alloc.c                            |  8 ++++----
 sound/soc/codecs/wm_adsp.h                 |  2 +-
 34 files changed, 79 insertions(+), 79 deletions(-)

diff --git a/Documentation/filesystems/debugfs.txt b/Documentation/filesystems/debugfs.txt
index 463f595733e8..4f45f71149cb 100644
--- a/Documentation/filesystems/debugfs.txt
+++ b/Documentation/filesystems/debugfs.txt
@@ -105,7 +105,7 @@ a variable of type size_t.
 Boolean values can be placed in debugfs with:
 
     struct dentry *debugfs_create_bool(const char *name, umode_t mode,
-				       struct dentry *parent, u32 *value);
+				       struct dentry *parent, bool *value);
 
 A read on the resulting file will yield either Y (for non-zero values) or
 N, followed by a newline.  If written to, it will accept either upper- or
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index 9b3b62ac9c24..1f4f4e346f38 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -58,7 +58,7 @@ static u32 mdscr_read(void)
  * Allow root to disable self-hosted debug from userspace.
  * This is useful if you want to connect an external JTAG debugger.
  */
-static u32 debug_enabled = 1;
+static bool debug_enabled = true;
 
 static int create_debug_debugfs_entry(void)
 {
@@ -69,7 +69,7 @@ fs_initcall(create_debug_debugfs_entry);
 
 static int __init early_debug_disable(char *buf)
 {
-	debug_enabled = 0;
+	debug_enabled = false;
 	return 0;
 }
 
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 2614a839c60d..f11e17ad7834 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1237,7 +1237,7 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
 	/* Use the global lock for all EC transactions? */
 	tmp = 0;
 	acpi_evaluate_integer(handle, "_GLK", NULL, &tmp);
-	ec->global_lock = tmp;
+	ec->global_lock = !!tmp;
 	ec->handle = handle;
 	return AE_CTRL_TERMINATE;
 }
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 9db196de003c..5a72e2b140fc 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -138,7 +138,7 @@ struct acpi_ec {
 	unsigned long gpe;
 	unsigned long command_addr;
 	unsigned long data_addr;
-	u32 global_lock;
+	bool global_lock;
 	unsigned long flags;
 	unsigned long reference_count;
 	struct mutex mutex;
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index cc557886ab23..5b907f2c62b9 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -122,9 +122,9 @@ struct regmap {
 	unsigned int num_reg_defaults_raw;
 
 	/* if set, only the cache is modified not the HW */
-	u32 cache_only;
+	bool cache_only;
 	/* if set, only the HW is modified not the cache */
-	u32 cache_bypass;
+	bool cache_bypass;
 	/* if set, remember to free reg_defaults_raw */
 	bool cache_free;
 
@@ -132,7 +132,7 @@ struct regmap {
 	const void *reg_defaults_raw;
 	void *cache;
 	/* if set, the cache contains newer data than the HW */
-	u32 cache_dirty;
+	bool cache_dirty;
 	/* if set, the HW registers are known to match map->reg_defaults */
 	bool no_sync_defaults;
 
diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 2d53f6f138e1..736e0d378567 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -355,9 +355,9 @@ static int regcache_lzo_sync(struct regmap *map, unsigned int min,
 		if (ret > 0 && val == map->reg_defaults[ret].def)
 			continue;
 
-		map->cache_bypass = 1;
+		map->cache_bypass = true;
 		ret = _regmap_write(map, i, val);
-		map->cache_bypass = 0;
+		map->cache_bypass = false;
 		if (ret)
 			return ret;
 		dev_dbg(map->dev, "Synced register %#x, value %#x\n",
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 6f8a13ec32a4..4c07802986b2 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -54,11 +54,11 @@ static int regcache_hw_init(struct regmap *map)
 		return -ENOMEM;
 
 	if (!map->reg_defaults_raw) {
-		u32 cache_bypass = map->cache_bypass;
+		bool cache_bypass = map->cache_bypass;
 		dev_warn(map->dev, "No cache defaults, reading back from HW\n");
 
 		/* Bypass the cache access till data read from HW*/
-		map->cache_bypass = 1;
+		map->cache_bypass = true;
 		tmp_buf = kmalloc(map->cache_size_raw, GFP_KERNEL);
 		if (!tmp_buf) {
 			ret = -ENOMEM;
@@ -285,9 +285,9 @@ static int regcache_default_sync(struct regmap *map, unsigned int min,
 		if (!regcache_reg_needs_sync(map, reg, val))
 			continue;
 
-		map->cache_bypass = 1;
+		map->cache_bypass = true;
 		ret = _regmap_write(map, reg, val);
-		map->cache_bypass = 0;
+		map->cache_bypass = false;
 		if (ret) {
 			dev_err(map->dev, "Unable to sync register %#x. %d\n",
 				reg, ret);
@@ -315,7 +315,7 @@ int regcache_sync(struct regmap *map)
 	int ret = 0;
 	unsigned int i;
 	const char *name;
-	unsigned int bypass;
+	bool bypass;
 
 	BUG_ON(!map->cache_ops);
 
@@ -333,7 +333,7 @@ int regcache_sync(struct regmap *map)
 	map->async = true;
 
 	/* Apply any patch first */
-	map->cache_bypass = 1;
+	map->cache_bypass = true;
 	for (i = 0; i < map->patch_regs; i++) {
 		ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);
 		if (ret != 0) {
@@ -342,7 +342,7 @@ int regcache_sync(struct regmap *map)
 			goto out;
 		}
 	}
-	map->cache_bypass = 0;
+	map->cache_bypass = false;
 
 	if (map->cache_ops->sync)
 		ret = map->cache_ops->sync(map, 0, map->max_register);
@@ -384,7 +384,7 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
 {
 	int ret = 0;
 	const char *name;
-	unsigned int bypass;
+	bool bypass;
 
 	BUG_ON(!map->cache_ops);
 
@@ -637,11 +637,11 @@ static int regcache_sync_block_single(struct regmap *map, void *block,
 		if (!regcache_reg_needs_sync(map, regtmp, val))
 			continue;
 
-		map->cache_bypass = 1;
+		map->cache_bypass = true;
 
 		ret = _regmap_write(map, regtmp, val);
 
-		map->cache_bypass = 0;
+		map->cache_bypass = false;
 		if (ret != 0) {
 			dev_err(map->dev, "Unable to sync register %#x. %d\n",
 				regtmp, ret);
@@ -668,14 +668,14 @@ static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,
 	dev_dbg(map->dev, "Writing %zu bytes for %d registers from 0x%x-0x%x\n",
 		count * val_bytes, count, base, cur - map->reg_stride);
 
-	map->cache_bypass = 1;
+	map->cache_bypass = true;
 
 	ret = _regmap_raw_write(map, base, *data, count * val_bytes);
 	if (ret)
 		dev_err(map->dev, "Unable to sync registers %#x-%#x. %d\n",
 			base, cur - map->reg_stride, ret);
 
-	map->cache_bypass = 0;
+	map->cache_bypass = false;
 
 	*data = NULL;
 
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 6b9b91267959..509477681661 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -80,8 +80,8 @@ struct qca_data {
 	spinlock_t hci_ibs_lock;	/* HCI_IBS state lock	*/
 	u8 tx_ibs_state;	/* HCI_IBS transmit side power state*/
 	u8 rx_ibs_state;	/* HCI_IBS receive side power state */
-	u32 tx_vote;		/* Clock must be on for TX */
-	u32 rx_vote;		/* Clock must be on for RX */
+	bool tx_vote;		/* Clock must be on for TX */
+	bool rx_vote;		/* Clock must be on for RX */
 	struct timer_list tx_idle_timer;
 	u32 tx_idle_delay;
 	struct timer_list wake_retrans_timer;
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 5ef347a13cb5..c59314523f4c 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -138,7 +138,7 @@ u16 amd_iommu_last_bdf;			/* largest PCI device id we have
 					   to handle */
 LIST_HEAD(amd_iommu_unity_map);		/* a list of required unity mappings
 					   we find in ACPI */
-u32 amd_iommu_unmap_flush;		/* if true, flush on every unmap */
+bool amd_iommu_unmap_flush;		/* if true, flush on every unmap */
 
 LIST_HEAD(amd_iommu_list);		/* list of all AMD IOMMUs in the
 					   system */
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index f65908841be0..861550a1ad1f 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -674,7 +674,7 @@ extern unsigned long *amd_iommu_pd_alloc_bitmap;
  * If true, the addresses will be flushed on unmap time, not when
  * they are reused
  */
-extern u32 amd_iommu_unmap_flush;
+extern bool amd_iommu_unmap_flush;
 
 /* Smallest max PASID supported by any IOMMU in the system */
 extern u32 amd_iommu_max_pasid;
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index e25ee16c658e..d74b6aa8ae27 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -528,7 +528,7 @@ struct mei_device {
 	DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX);
 	unsigned long me_client_index;
 
-	u32 allow_fixed_address;
+	bool allow_fixed_address;
 
 	struct mei_cl wd_cl;
 	enum mei_wd_states wd_state;
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index fa0c7b54ec7a..5384f999c24b 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -767,8 +767,8 @@ struct adapter {
 	bool tid_release_task_busy;
 
 	struct dentry *debugfs_root;
-	u32 use_bd;     /* Use SGE Back Door intfc for reading SGE Contexts */
-	u32 trace_rss;	/* 1 implies that different RSS flit per filter is
+	bool use_bd;     /* Use SGE Back Door intfc for reading SGE Contexts */
+	bool trace_rss;	/* 1 implies that different RSS flit per filter is
 			 * used per filter else if 0 default RSS flit is
 			 * used for all 4 filters.
 			 */
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 12542144fe12..b6a08177b6ee 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -680,7 +680,7 @@ struct ath10k {
 	bool monitor_started;
 	unsigned int filter_flags;
 	unsigned long dev_flags;
-	u32 dfs_block_radar_events;
+	bool dfs_block_radar_events;
 
 	/* protected by conf_mutex */
 	bool radar_enabled;
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index fa6e89e5c421..ba12f7f4061d 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -1367,7 +1367,7 @@ struct ath5k_hw {
 	u8			ah_retry_long;
 	u8			ah_retry_short;
 
-	u32			ah_use_32khz_clock;
+	bool			ah_use_32khz_clock;
 
 	u8			ah_coverage_class;
 	bool			ah_ack_bitrate_high;
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 1dd0339de372..8823fadada89 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -385,7 +385,7 @@ static void ath9k_hw_init_config(struct ath_hw *ah)
 
 	ah->config.dma_beacon_response_time = 1;
 	ah->config.sw_beacon_response_time = 6;
-	ah->config.cwm_ignore_extcca = 0;
+	ah->config.cwm_ignore_extcca = false;
 	ah->config.analog_shiftreg = 1;
 
 	ah->config.rx_intr_mitigation = true;
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index e8454db17634..52971b48ab6a 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -332,14 +332,14 @@ enum ath9k_hw_hang_checks {
 struct ath9k_ops_config {
 	int dma_beacon_response_time;
 	int sw_beacon_response_time;
-	u32 cwm_ignore_extcca;
+	bool cwm_ignore_extcca;
 	u32 pcie_waen;
 	u8 analog_shiftreg;
 	u32 ofdm_trig_low;
 	u32 ofdm_trig_high;
 	u32 cck_trig_high;
 	u32 cck_trig_low;
-	u32 enable_paprd;
+	bool enable_paprd;
 	int serialize_regmode;
 	bool rx_intr_mitigation;
 	bool tx_intr_mitigation;
diff --git a/drivers/net/wireless/b43/debugfs.c b/drivers/net/wireless/b43/debugfs.c
index e807bd930647..b4bcd94aff6c 100644
--- a/drivers/net/wireless/b43/debugfs.c
+++ b/drivers/net/wireless/b43/debugfs.c
@@ -676,15 +676,15 @@ static void b43_add_dynamic_debug(struct b43_wldev *dev)
 		e->dyn_debug_dentries[id] = d;		\
 				} while (0)
 
-	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
-	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
-	add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
-	add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
-	add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
-	add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
-	add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
-	add_dyn_dbg("debug_keys", B43_DBG_KEYS, 0);
-	add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, 0);
+	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, false);
+	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, false);
+	add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, false);
+	add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, false);
+	add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, false);
+	add_dyn_dbg("debug_lo", B43_DBG_LO, false);
+	add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, false);
+	add_dyn_dbg("debug_keys", B43_DBG_KEYS, false);
+	add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, false);
 
 #undef add_dyn_dbg
 }
diff --git a/drivers/net/wireless/b43/debugfs.h b/drivers/net/wireless/b43/debugfs.h
index 50517b801cb4..d05377745011 100644
--- a/drivers/net/wireless/b43/debugfs.h
+++ b/drivers/net/wireless/b43/debugfs.h
@@ -68,7 +68,7 @@ struct b43_dfsentry {
 	u32 shm32read_addr_next;
 
 	/* Enabled/Disabled list for the dynamic debugging features. */
-	u32 dyn_debug[__B43_NR_DYNDBG];
+	bool dyn_debug[__B43_NR_DYNDBG];
 	/* Dentries for the dynamic debugging entries. */
 	struct dentry *dyn_debug_dentries[__B43_NR_DYNDBG];
 };
diff --git a/drivers/net/wireless/b43legacy/debugfs.c b/drivers/net/wireless/b43legacy/debugfs.c
index 1965edb765a2..090910ea259e 100644
--- a/drivers/net/wireless/b43legacy/debugfs.c
+++ b/drivers/net/wireless/b43legacy/debugfs.c
@@ -369,11 +369,11 @@ static void b43legacy_add_dynamic_debug(struct b43legacy_wldev *dev)
 		e->dyn_debug_dentries[id] = d;		\
 				} while (0)
 
-	add_dyn_dbg("debug_xmitpower", B43legacy_DBG_XMITPOWER, 0);
-	add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, 0);
-	add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, 0);
-	add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, 0);
-	add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, 0);
+	add_dyn_dbg("debug_xmitpower", B43legacy_DBG_XMITPOWER, false);
+	add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, false);
+	add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, false);
+	add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, false);
+	add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, false);
 
 #undef add_dyn_dbg
 }
diff --git a/drivers/net/wireless/b43legacy/debugfs.h b/drivers/net/wireless/b43legacy/debugfs.h
index ae3b0d0fa849..9ee32158b947 100644
--- a/drivers/net/wireless/b43legacy/debugfs.h
+++ b/drivers/net/wireless/b43legacy/debugfs.h
@@ -47,7 +47,7 @@ struct b43legacy_dfsentry {
 	struct b43legacy_txstatus_log txstatlog;
 
 	/* Enabled/Disabled list for the dynamic debugging features. */
-	u32 dyn_debug[__B43legacy_NR_DYNDBG];
+	bool dyn_debug[__B43legacy_NR_DYNDBG];
 	/* Dentries for the dynamic debugging entries. */
 	struct dentry *dyn_debug_dentries[__B43legacy_NR_DYNDBG];
 };
diff --git a/drivers/net/wireless/iwlegacy/common.h b/drivers/net/wireless/iwlegacy/common.h
index 5b972798bdff..ce52cf114fde 100644
--- a/drivers/net/wireless/iwlegacy/common.h
+++ b/drivers/net/wireless/iwlegacy/common.h
@@ -1425,9 +1425,9 @@ struct il_priv {
 #endif				/* CONFIG_IWLEGACY_DEBUGFS */
 
 	struct work_struct txpower_work;
-	u32 disable_sens_cal;
-	u32 disable_chain_noise_cal;
-	u32 disable_tx_power_cal;
+	bool disable_sens_cal;
+	bool disable_chain_noise_cal;
+	bool disable_tx_power_cal;
 	struct work_struct run_time_calib_work;
 	struct timer_list stats_periodic;
 	struct timer_list watchdog;
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index b95a07ec9e36..72e8a03a5293 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -649,7 +649,7 @@ struct iwl_mvm {
 	const struct iwl_fw_bcast_filter *bcast_filters;
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 	struct {
-		u32 override; /* u32 for debugfs_create_bool */
+		bool override;
 		struct iwl_bcast_filter_cmd cmd;
 	} dbgfs_bcast_filtering;
 #endif
@@ -673,7 +673,7 @@ struct iwl_mvm {
 	bool disable_power_off;
 	bool disable_power_off_d3;
 
-	u32 scan_iter_notif_enabled; /* must be u32 for debugfs_create_bool */
+	bool scan_iter_notif_enabled;
 
 	struct debugfs_blob_wrapper nvm_hw_blob;
 	struct debugfs_blob_wrapper nvm_sw_blob;
@@ -729,7 +729,7 @@ struct iwl_mvm {
 	int n_nd_channels;
 	bool net_detect;
 #ifdef CONFIG_IWLWIFI_DEBUGFS
-	u32 d3_wake_sysassert; /* must be u32 for debugfs_create_bool */
+	bool d3_wake_sysassert;
 	bool d3_test_active;
 	bool store_d3_resume_sram;
 	void *d3_resume_sram;
diff --git a/drivers/scsi/snic/snic_trc.c b/drivers/scsi/snic/snic_trc.c
index 28a40a7ade38..f00ebf4717e0 100644
--- a/drivers/scsi/snic/snic_trc.c
+++ b/drivers/scsi/snic/snic_trc.c
@@ -148,7 +148,7 @@ snic_trc_init(void)
 
 	trc->max_idx = (tbuf_sz / SNIC_TRC_ENTRY_SZ);
 	trc->rd_idx = trc->wr_idx = 0;
-	trc->enable = 1;
+	trc->enable = true;
 	SNIC_INFO("Trace Facility Enabled.\n Trace Buffer SZ %lu Pages.\n",
 		  tbuf_sz / PAGE_SIZE);
 	ret = 0;
@@ -169,7 +169,7 @@ snic_trc_free(void)
 {
 	struct snic_trc *trc = &snic_glob->trc;
 
-	trc->enable = 0;
+	trc->enable = false;
 	snic_trc_debugfs_term();
 
 	if (trc->buf) {
diff --git a/drivers/scsi/snic/snic_trc.h b/drivers/scsi/snic/snic_trc.h
index 427faee5f97e..b37f8867bfde 100644
--- a/drivers/scsi/snic/snic_trc.h
+++ b/drivers/scsi/snic/snic_trc.h
@@ -45,7 +45,7 @@ struct snic_trc {
 	u32	max_idx;		/* Max Index into trace buffer */
 	u32	rd_idx;
 	u32	wr_idx;
-	u32	enable;			/* Control Variable for Tracing */
+	bool	enable;			/* Control Variable for Tracing */
 
 	struct dentry *trc_enable;	/* debugfs file object */
 	struct dentry *trc_file;
diff --git a/drivers/uwb/uwb-debug.c b/drivers/uwb/uwb-debug.c
index 0b1e5a9449b5..991374b13571 100644
--- a/drivers/uwb/uwb-debug.c
+++ b/drivers/uwb/uwb-debug.c
@@ -55,7 +55,7 @@
 struct uwb_dbg {
 	struct uwb_pal pal;
 
-	u32 accept;
+	bool accept;
 	struct list_head rsvs;
 
 	struct dentry *root_d;
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 6c55ade071c3..b70c20fae502 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -439,7 +439,7 @@ ssize_t debugfs_read_file_bool(struct file *file, char __user *user_buf,
 			       size_t count, loff_t *ppos)
 {
 	char buf[3];
-	u32 *val = file->private_data;
+	bool *val = file->private_data;
 
 	if (*val)
 		buf[0] = 'Y';
@@ -457,7 +457,7 @@ ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf,
 	char buf[32];
 	size_t buf_size;
 	bool bv;
-	u32 *val = file->private_data;
+	bool *val = file->private_data;
 
 	buf_size = min(count, (sizeof(buf)-1));
 	if (copy_from_user(buf, user_buf, buf_size))
@@ -503,7 +503,7 @@ static const struct file_operations fops_bool = {
  * code.
  */
 struct dentry *debugfs_create_bool(const char *name, umode_t mode,
-				   struct dentry *parent, u32 *value)
+				   struct dentry *parent, bool *value)
 {
 	return debugfs_create_file(name, mode, parent, value, &fops_bool);
 }
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index 9beb636b97eb..8321fe3058d6 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -92,7 +92,7 @@ struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
 struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
 				     struct dentry *parent, atomic_t *value);
 struct dentry *debugfs_create_bool(const char *name, umode_t mode,
-				  struct dentry *parent, u32 *value);
+				  struct dentry *parent, bool *value);
 
 struct dentry *debugfs_create_blob(const char *name, umode_t mode,
 				  struct dentry *parent,
@@ -243,7 +243,7 @@ static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t m
 
 static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
 						 struct dentry *parent,
-						 u32 *value)
+						 bool *value)
 {
 	return ERR_PTR(-ENODEV);
 }
diff --git a/include/linux/edac.h b/include/linux/edac.h
index da3b72e95db3..7c6b7ba55589 100644
--- a/include/linux/edac.h
+++ b/include/linux/edac.h
@@ -772,7 +772,7 @@ struct mem_ctl_info {
 #ifdef CONFIG_EDAC_DEBUG
 	struct dentry *debugfs;
 	u8 fake_inject_layer[EDAC_MAX_LAYERS];
-	u32 fake_inject_ue;
+	bool fake_inject_ue;
 	u16 fake_inject_count;
 #endif
 };
diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index 798fad9e420d..3159a7dba034 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -18,7 +18,7 @@ struct fault_attr {
 	atomic_t times;
 	atomic_t space;
 	unsigned long verbose;
-	u32 task_filter;
+	bool task_filter;
 	unsigned long stacktrace_depth;
 	unsigned long require_start;
 	unsigned long require_end;
diff --git a/kernel/futex.c b/kernel/futex.c
index 6e443efc65f4..395b967841b4 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -267,10 +267,10 @@ static struct futex_hash_bucket *futex_queues;
 static struct {
 	struct fault_attr attr;
 
-	u32 ignore_private;
+	bool ignore_private;
 } fail_futex = {
 	.attr = FAULT_ATTR_INITIALIZER,
-	.ignore_private = 0,
+	.ignore_private = false,
 };
 
 static int __init setup_fail_futex(char *str)
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index dace71fe41f7..fcb65d2a0b94 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -100,7 +100,7 @@ static LIST_HEAD(free_entries);
 static DEFINE_SPINLOCK(free_entries_lock);
 
 /* Global disable flag - will be set in case of an error */
-static u32 global_disable __read_mostly;
+static bool global_disable __read_mostly;
 
 /* Early initialization disable flag, set at the end of dma_debug_init */
 static bool dma_debug_initialized __read_mostly;
diff --git a/mm/failslab.c b/mm/failslab.c
index fefaabaab76d..98fb490311eb 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -3,12 +3,12 @@
 
 static struct {
 	struct fault_attr attr;
-	u32 ignore_gfp_wait;
-	int cache_filter;
+	bool ignore_gfp_wait;
+	bool cache_filter;
 } failslab = {
 	.attr = FAULT_ATTR_INITIALIZER,
-	.ignore_gfp_wait = 1,
-	.cache_filter = 0,
+	.ignore_gfp_wait = true,
+	.cache_filter = false,
 };
 
 bool should_failslab(size_t size, gfp_t gfpflags, unsigned long cache_flags)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 48aaf7b9f253..805bbad2e24e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2159,13 +2159,13 @@ struct page *buffered_rmqueue(struct zone *preferred_zone,
 static struct {
 	struct fault_attr attr;
 
-	u32 ignore_gfp_highmem;
-	u32 ignore_gfp_wait;
+	bool ignore_gfp_highmem;
+	bool ignore_gfp_wait;
 	u32 min_order;
 } fail_page_alloc = {
 	.attr = FAULT_ATTR_INITIALIZER,
-	.ignore_gfp_wait = 1,
-	.ignore_gfp_highmem = 1,
+	.ignore_gfp_wait = true,
+	.ignore_gfp_highmem = true,
 	.min_order = 1,
 };
 
diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h
index 579a6350fb01..2d117cf0e953 100644
--- a/sound/soc/codecs/wm_adsp.h
+++ b/sound/soc/codecs/wm_adsp.h
@@ -53,7 +53,7 @@ struct wm_adsp {
 
 	int fw;
 	int fw_ver;
-	u32 running;
+	bool running;
 
 	struct list_head ctl_list;
 
-- 
2.4.0

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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Charles Keepax]

On Tue, Sep 15, 2015 at 02:04:59PM +0530, Viresh Kumar wrote:
> Long back 'bool' type used to be a typecast to 'int', but that changed
> in v2.6.19. And that is a typecast to _Bool now, which (mostly) takes
> just a byte. Anyway, the bool type is implementation defined, and better
> we don't assume its size to be 4 bytes or 1.
> 
> The problem with current code is that it reads/writes 4 bytes for a
> boolean, which will read/update 3 excess bytes following the boolean
> variable (when sizeof(bool) is 1 byte). And that can lead to hard to fix
> bugs. It was a nightmare cracking this one.
> 
> The debugfs code had this bug since the first time it got introduced,
> but was never got caught, strange. Maybe the bool variables (monitored
> by debugfs) were followed by an 'int' or something bigger and the pad
> bytes made sure, we never see this issue.
> 
> But the OPP (Operating performance points) library have three booleans
> allocated to contiguous bytes and this bug got hit quite soon (The
> debugfs support for OPP is yet to be merged). It showed up as corruption
> of the debugfs boolean symbols, where Y were becoming N and vice versa.
> 
> Fix it properly by changing the last argument of debugfs_create_bool(),
> to type 'bool *' instead of 'u32 *', so that it doesn't depend on sizeof
> bool at all.
> 
> That required updates to all user sites as well in a single commit.
> regmap core was also using debugfs_{read|write}_file_bool(), directly
> and variable types were updated for that to be bool as well.
> 
> Acked-by: Mark Brown <broonie@kernel.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---

For the minor wm_adsp change:

Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>

Thanks,
Charles

Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Johannes Berg]

Hi,

This email has far too many people Cc'ed on it - I don't think vger is
even accepting it for that reason. You should probably restrict it to
just a few lists when you resubmit.

> The problem with current code is that it reads/writes 4 bytes for a
> boolean, which will read/update 3 excess bytes following the boolean
> variable (when sizeof(bool) is 1 byte). And that can lead to hard to 
> fix bugs. It was a nightmare cracking this one.

Unless you're ignoring (or worse, casting away) type warnings, there's
no problem/bug at all, you just have to define all the variables used
with debugfs_create_bool() as actual u32 variables.

It sounds like you are/were doing something like the following:

bool a, b, c;
...
debugfs_create_bool("a", 0600, dir, (u32 *)&a);

which is quite clearly invalid.

Had you properly defined them as u32, as everyone (except for the ACPI
case) does, there wouldn't have been any problem:

u32 a, b, c;
...
debugfs_create_bool("a", 0600, dir, &a);


As far as I can tell, there's no bug in the API. It might be a bit
strange to have a set of functions called debugfs_create_<type> and
then one of them doesn't actually use the type from the name, but
that's only a problem if you blindly add casts or ignore the compiler
warnings you'd get without casts.

In other words, I think your commit log is extremely misleading. The
API perhaps has some inconsistent naming, but all this talk about the
sizeof(bool) etc. is simply completely irrelevant since "bool" is not
the type used here at all. There's nothing to fix in any of the code
you're changing (again, apart from ACPI.)

That said, I don't actually object to this change itself, being able to
actually use bool variables with debugfs_create_bool would be nice.
However, that shouldn't be documented as a bugfix or anything like
that, merely as a cleanup to make the API naming more consistent and to
be able to use the (smaller and often more convenient) bool type.

Clearly, it would also lead to less confusion, as we see in ACPI and
hear from your OPP code. Note that ACPI is even more confused though
since it uses "unsigned long", so it's entirely possible that somebody
actually thought about that case and decided not to worry about 64-bit
big-endian platforms.

Of course this also means that only the ACPI patch is a candidate for s
table.

johannes

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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Viresh Kumar]

Hi Johannes,

On 15-09-15, 12:37, Johannes Berg wrote:
> This email has far too many people Cc'ed on it - I don't think vger is
> even accepting it for that reason. You should probably restrict it to
> just a few lists when you resubmit.

Hmm, I know the list is too long and yes its blocked for Admin's
approval on most of the lists. But that's what was generated by
get_maintainers and I didn't wanted to miss cc'ing anybody who might
be able to catch a bug in there.

> > The problem with current code is that it reads/writes 4 bytes for a
> > boolean, which will read/update 3 excess bytes following the boolean
> > variable (when sizeof(bool) is 1 byte). And that can lead to hard to 
> > fix bugs. It was a nightmare cracking this one.
> 
> Unless you're ignoring (or worse, casting away) type warnings, there's
> no problem/bug at all, you just have to define all the variables used
> with debugfs_create_bool() as actual u32 variables.
> 
> It sounds like you are/were doing something like the following:
> 
> bool a, b, c;
> ...
> debugfs_create_bool("a", 0600, dir, (u32 *)&a);
> 
> which is quite clearly invalid.
> 
> Had you properly defined them as u32, as everyone (except for the ACPI
> case) does, there wouldn't have been any problem:
> 
> u32 a, b, c;
> ...
> debugfs_create_bool("a", 0600, dir, &a);
> 
> 
> As far as I can tell, there's no bug in the API. It might be a bit
> strange to have a set of functions called debugfs_create_<type> and
> then one of them doesn't actually use the type from the name, but
> that's only a problem if you blindly add casts or ignore the compiler
> warnings you'd get without casts.
> 
> In other words, I think your commit log is extremely misleading. The
> API perhaps has some inconsistent naming, but all this talk about the
> sizeof(bool) etc. is simply completely irrelevant since "bool" is not
> the type used here at all. There's nothing to fix in any of the code
> you're changing (again, apart from ACPI.)
> 
> That said, I don't actually object to this change itself, being able to
> actually use bool variables with debugfs_create_bool would be nice.
> However, that shouldn't be documented as a bugfix or anything like
> that, merely as a cleanup to make the API naming more consistent and to
> be able to use the (smaller and often more convenient) bool type.
> 
> Clearly, it would also lead to less confusion, as we see in ACPI and
> hear from your OPP code. Note that ACPI is even more confused though
> since it uses "unsigned long", so it's entirely possible that somebody
> actually thought about that case and decided not to worry about 64-bit
> big-endian platforms.
> 
> Of course this also means that only the ACPI patch is a candidate for s
> table.

Yeah, that's right. Its just a trivial cleanup rather. What about this
simple changelog instead?

--
viresh

-------------------------8<-------------------------

Subject: [PATCH] debugfs: Pass bool pointer to debugfs_create_bool()

Its a bit odd that debugfs_create_bool() takes 'u32 *' as an argument,
when all it needs is a boolean pointer.

It would be better to update this API to make it accept 'bool *'
instead, as that will make it more consistent and often more convenient.
Over that bool takes just a byte.

That required updates to all user sites as well in a single commit.
regmap core was also using debugfs_{read|write}_file_bool(), directly
and variable types were updated for that to be bool as well.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Steven Rostedt]

On Tue, 15 Sep 2015 16:34:47 +0530
Viresh Kumar <viresh.kumar@linaro.org> wrote:

> Hi Johannes,
> 
> On 15-09-15, 12:37, Johannes Berg wrote:
> > This email has far too many people Cc'ed on it - I don't think vger is
> > even accepting it for that reason. You should probably restrict it to
> > just a few lists when you resubmit.
> 
> Hmm, I know the list is too long and yes its blocked for Admin's
> approval on most of the lists. But that's what was generated by
> get_maintainers and I didn't wanted to miss cc'ing anybody who might
> be able to catch a bug in there.

Then break up the patch. Your Cc list is far too large, I would nack
this patch just for that alone.

Sad part is, you didn't even Cc Linus (which I added). I believe he was
against having bool's in structures before.

Linus, This patch changes a lot of u32s into bools in structures.
What's your take on that?

I added the patch again to the bottom of this email so that Linus may
see it (it was cut from the email I'm replying to).

-- Steve


> 
> > > The problem with current code is that it reads/writes 4 bytes for a
> > > boolean, which will read/update 3 excess bytes following the boolean
> > > variable (when sizeof(bool) is 1 byte). And that can lead to hard to 
> > > fix bugs. It was a nightmare cracking this one.
> > 
> > Unless you're ignoring (or worse, casting away) type warnings, there's
> > no problem/bug at all, you just have to define all the variables used
> > with debugfs_create_bool() as actual u32 variables.
> > 
> > It sounds like you are/were doing something like the following:
> > 
> > bool a, b, c;
> > ...
> > debugfs_create_bool("a", 0600, dir, (u32 *)&a);
> > 
> > which is quite clearly invalid.
> > 
> > Had you properly defined them as u32, as everyone (except for the ACPI
> > case) does, there wouldn't have been any problem:
> > 
> > u32 a, b, c;
> > ...
> > debugfs_create_bool("a", 0600, dir, &a);
> > 
> > 
> > As far as I can tell, there's no bug in the API. It might be a bit
> > strange to have a set of functions called debugfs_create_<type> and
> > then one of them doesn't actually use the type from the name, but
> > that's only a problem if you blindly add casts or ignore the compiler
> > warnings you'd get without casts.
> > 
> > In other words, I think your commit log is extremely misleading. The
> > API perhaps has some inconsistent naming, but all this talk about the
> > sizeof(bool) etc. is simply completely irrelevant since "bool" is not
> > the type used here at all. There's nothing to fix in any of the code
> > you're changing (again, apart from ACPI.)
> > 
> > That said, I don't actually object to this change itself, being able to
> > actually use bool variables with debugfs_create_bool would be nice.
> > However, that shouldn't be documented as a bugfix or anything like
> > that, merely as a cleanup to make the API naming more consistent and to
> > be able to use the (smaller and often more convenient) bool type.
> > 
> > Clearly, it would also lead to less confusion, as we see in ACPI and
> > hear from your OPP code. Note that ACPI is even more confused though
> > since it uses "unsigned long", so it's entirely possible that somebody
> > actually thought about that case and decided not to worry about 64-bit
> > big-endian platforms.
> > 
> > Of course this also means that only the ACPI patch is a candidate for s
> > table.
> 
> Yeah, that's right. Its just a trivial cleanup rather. What about this
> simple changelog instead?
> 
> --
> viresh
> 
> -------------------------8<-------------------------
> 
> Subject: [PATCH] debugfs: Pass bool pointer to debugfs_create_bool()
> 
> Its a bit odd that debugfs_create_bool() takes 'u32 *' as an argument,
> when all it needs is a boolean pointer.
> 
> It would be better to update this API to make it accept 'bool *'
> instead, as that will make it more consistent and often more convenient.
> Over that bool takes just a byte.
> 
> That required updates to all user sites as well in a single commit.
> regmap core was also using debugfs_{read|write}_file_bool(), directly
> and variable types were updated for that to be bool as well.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>



Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---

V2->V3:
- Moved a bug fix in a separate patch 1/2, so that it can be backported.
- Added Ack from Mark.

 Documentation/filesystems/debugfs.txt      |  2 +-
 arch/arm64/kernel/debug-monitors.c         |  4 ++--
 drivers/acpi/ec.c                          |  2 +-
 drivers/acpi/internal.h                    |  2 +-
 drivers/base/regmap/internal.h             |  6 +++---
 drivers/base/regmap/regcache-lzo.c         |  4 ++--
 drivers/base/regmap/regcache.c             | 24 ++++++++++++------------
 drivers/bluetooth/hci_qca.c                |  4 ++--
 drivers/iommu/amd_iommu_init.c             |  2 +-
 drivers/iommu/amd_iommu_types.h            |  2 +-
 drivers/misc/mei/mei_dev.h                 |  2 +-
 drivers/net/ethernet/chelsio/cxgb4/cxgb4.h |  4 ++--
 drivers/net/wireless/ath/ath10k/core.h     |  2 +-
 drivers/net/wireless/ath/ath5k/ath5k.h     |  2 +-
 drivers/net/wireless/ath/ath9k/hw.c        |  2 +-
 drivers/net/wireless/ath/ath9k/hw.h        |  4 ++--
 drivers/net/wireless/b43/debugfs.c         | 18 +++++++++---------
 drivers/net/wireless/b43/debugfs.h         |  2 +-
 drivers/net/wireless/b43legacy/debugfs.c   | 10 +++++-----
 drivers/net/wireless/b43legacy/debugfs.h   |  2 +-
 drivers/net/wireless/iwlegacy/common.h     |  6 +++---
 drivers/net/wireless/iwlwifi/mvm/mvm.h     |  6 +++---
 drivers/scsi/snic/snic_trc.c               |  4 ++--
 drivers/scsi/snic/snic_trc.h               |  2 +-
 drivers/uwb/uwb-debug.c                    |  2 +-
 fs/debugfs/file.c                          |  6 +++---
 include/linux/debugfs.h                    |  4 ++--
 include/linux/edac.h                       |  2 +-
 include/linux/fault-inject.h               |  2 +-
 kernel/futex.c                             |  4 ++--
 lib/dma-debug.c                            |  2 +-
 mm/failslab.c                              |  8 ++++----
 mm/page_alloc.c                            |  8 ++++----
 sound/soc/codecs/wm_adsp.h                 |  2 +-
 34 files changed, 79 insertions(+), 79 deletions(-)

diff --git a/Documentation/filesystems/debugfs.txt b/Documentation/filesystems/debugfs.txt
index 463f595733e8..4f45f71149cb 100644
--- a/Documentation/filesystems/debugfs.txt
+++ b/Documentation/filesystems/debugfs.txt
@@ -105,7 +105,7 @@ a variable of type size_t.
 Boolean values can be placed in debugfs with:
 
     struct dentry *debugfs_create_bool(const char *name, umode_t mode,
-				       struct dentry *parent, u32 *value);
+				       struct dentry *parent, bool *value);
 
 A read on the resulting file will yield either Y (for non-zero values) or
 N, followed by a newline.  If written to, it will accept either upper- or
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index 9b3b62ac9c24..1f4f4e346f38 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -58,7 +58,7 @@ static u32 mdscr_read(void)
  * Allow root to disable self-hosted debug from userspace.
  * This is useful if you want to connect an external JTAG debugger.
  */
-static u32 debug_enabled = 1;
+static bool debug_enabled = true;
 
 static int create_debug_debugfs_entry(void)
 {
@@ -69,7 +69,7 @@ fs_initcall(create_debug_debugfs_entry);
 
 static int __init early_debug_disable(char *buf)
 {
-	debug_enabled = 0;
+	debug_enabled = false;
 	return 0;
 }
 
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 2614a839c60d..f11e17ad7834 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1237,7 +1237,7 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
 	/* Use the global lock for all EC transactions? */
 	tmp = 0;
 	acpi_evaluate_integer(handle, "_GLK", NULL, &tmp);
-	ec->global_lock = tmp;
+	ec->global_lock = !!tmp;
 	ec->handle = handle;
 	return AE_CTRL_TERMINATE;
 }
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 9db196de003c..5a72e2b140fc 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -138,7 +138,7 @@ struct acpi_ec {
 	unsigned long gpe;
 	unsigned long command_addr;
 	unsigned long data_addr;
-	u32 global_lock;
+	bool global_lock;
 	unsigned long flags;
 	unsigned long reference_count;
 	struct mutex mutex;
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index cc557886ab23..5b907f2c62b9 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -122,9 +122,9 @@ struct regmap {
 	unsigned int num_reg_defaults_raw;
 
 	/* if set, only the cache is modified not the HW */
-	u32 cache_only;
+	bool cache_only;
 	/* if set, only the HW is modified not the cache */
-	u32 cache_bypass;
+	bool cache_bypass;
 	/* if set, remember to free reg_defaults_raw */
 	bool cache_free;
 
@@ -132,7 +132,7 @@ struct regmap {
 	const void *reg_defaults_raw;
 	void *cache;
 	/* if set, the cache contains newer data than the HW */
-	u32 cache_dirty;
+	bool cache_dirty;
 	/* if set, the HW registers are known to match map->reg_defaults */
 	bool no_sync_defaults;
 
diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 2d53f6f138e1..736e0d378567 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -355,9 +355,9 @@ static int regcache_lzo_sync(struct regmap *map, unsigned int min,
 		if (ret > 0 && val == map->reg_defaults[ret].def)
 			continue;
 
-		map->cache_bypass = 1;
+		map->cache_bypass = true;
 		ret = _regmap_write(map, i, val);
-		map->cache_bypass = 0;
+		map->cache_bypass = false;
 		if (ret)
 			return ret;
 		dev_dbg(map->dev, "Synced register %#x, value %#x\n",
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 6f8a13ec32a4..4c07802986b2 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -54,11 +54,11 @@ static int regcache_hw_init(struct regmap *map)
 		return -ENOMEM;
 
 	if (!map->reg_defaults_raw) {
-		u32 cache_bypass = map->cache_bypass;
+		bool cache_bypass = map->cache_bypass;
 		dev_warn(map->dev, "No cache defaults, reading back from HW\n");
 
 		/* Bypass the cache access till data read from HW*/
-		map->cache_bypass = 1;
+		map->cache_bypass = true;
 		tmp_buf = kmalloc(map->cache_size_raw, GFP_KERNEL);
 		if (!tmp_buf) {
 			ret = -ENOMEM;
@@ -285,9 +285,9 @@ static int regcache_default_sync(struct regmap *map, unsigned int min,
 		if (!regcache_reg_needs_sync(map, reg, val))
 			continue;
 
-		map->cache_bypass = 1;
+		map->cache_bypass = true;
 		ret = _regmap_write(map, reg, val);
-		map->cache_bypass = 0;
+		map->cache_bypass = false;
 		if (ret) {
 			dev_err(map->dev, "Unable to sync register %#x. %d\n",
 				reg, ret);
@@ -315,7 +315,7 @@ int regcache_sync(struct regmap *map)
 	int ret = 0;
 	unsigned int i;
 	const char *name;
-	unsigned int bypass;
+	bool bypass;
 
 	BUG_ON(!map->cache_ops);
 
@@ -333,7 +333,7 @@ int regcache_sync(struct regmap *map)
 	map->async = true;
 
 	/* Apply any patch first */
-	map->cache_bypass = 1;
+	map->cache_bypass = true;
 	for (i = 0; i < map->patch_regs; i++) {
 		ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);
 		if (ret != 0) {
@@ -342,7 +342,7 @@ int regcache_sync(struct regmap *map)
 			goto out;
 		}
 	}
-	map->cache_bypass = 0;
+	map->cache_bypass = false;
 
 	if (map->cache_ops->sync)
 		ret = map->cache_ops->sync(map, 0, map->max_register);
@@ -384,7 +384,7 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
 {
 	int ret = 0;
 	const char *name;
-	unsigned int bypass;
+	bool bypass;
 
 	BUG_ON(!map->cache_ops);
 
@@ -637,11 +637,11 @@ static int regcache_sync_block_single(struct regmap *map, void *block,
 		if (!regcache_reg_needs_sync(map, regtmp, val))
 			continue;
 
-		map->cache_bypass = 1;
+		map->cache_bypass = true;
 
 		ret = _regmap_write(map, regtmp, val);
 
-		map->cache_bypass = 0;
+		map->cache_bypass = false;
 		if (ret != 0) {
 			dev_err(map->dev, "Unable to sync register %#x. %d\n",
 				regtmp, ret);
@@ -668,14 +668,14 @@ static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,
 	dev_dbg(map->dev, "Writing %zu bytes for %d registers from 0x%x-0x%x\n",
 		count * val_bytes, count, base, cur - map->reg_stride);
 
-	map->cache_bypass = 1;
+	map->cache_bypass = true;
 
 	ret = _regmap_raw_write(map, base, *data, count * val_bytes);
 	if (ret)
 		dev_err(map->dev, "Unable to sync registers %#x-%#x. %d\n",
 			base, cur - map->reg_stride, ret);
 
-	map->cache_bypass = 0;
+	map->cache_bypass = false;
 
 	*data = NULL;
 
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 6b9b91267959..509477681661 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -80,8 +80,8 @@ struct qca_data {
 	spinlock_t hci_ibs_lock;	/* HCI_IBS state lock	*/
 	u8 tx_ibs_state;	/* HCI_IBS transmit side power state*/
 	u8 rx_ibs_state;	/* HCI_IBS receive side power state */
-	u32 tx_vote;		/* Clock must be on for TX */
-	u32 rx_vote;		/* Clock must be on for RX */
+	bool tx_vote;		/* Clock must be on for TX */
+	bool rx_vote;		/* Clock must be on for RX */
 	struct timer_list tx_idle_timer;
 	u32 tx_idle_delay;
 	struct timer_list wake_retrans_timer;
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 5ef347a13cb5..c59314523f4c 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -138,7 +138,7 @@ u16 amd_iommu_last_bdf;			/* largest PCI device id we have
 					   to handle */
 LIST_HEAD(amd_iommu_unity_map);		/* a list of required unity mappings
 					   we find in ACPI */
-u32 amd_iommu_unmap_flush;		/* if true, flush on every unmap */
+bool amd_iommu_unmap_flush;		/* if true, flush on every unmap */
 
 LIST_HEAD(amd_iommu_list);		/* list of all AMD IOMMUs in the
 					   system */
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index f65908841be0..861550a1ad1f 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -674,7 +674,7 @@ extern unsigned long *amd_iommu_pd_alloc_bitmap;
  * If true, the addresses will be flushed on unmap time, not when
  * they are reused
  */
-extern u32 amd_iommu_unmap_flush;
+extern bool amd_iommu_unmap_flush;
 
 /* Smallest max PASID supported by any IOMMU in the system */
 extern u32 amd_iommu_max_pasid;
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index e25ee16c658e..d74b6aa8ae27 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -528,7 +528,7 @@ struct mei_device {
 	DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX);
 	unsigned long me_client_index;
 
-	u32 allow_fixed_address;
+	bool allow_fixed_address;
 
 	struct mei_cl wd_cl;
 	enum mei_wd_states wd_state;
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index fa0c7b54ec7a..5384f999c24b 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -767,8 +767,8 @@ struct adapter {
 	bool tid_release_task_busy;
 
 	struct dentry *debugfs_root;
-	u32 use_bd;     /* Use SGE Back Door intfc for reading SGE Contexts */
-	u32 trace_rss;	/* 1 implies that different RSS flit per filter is
+	bool use_bd;     /* Use SGE Back Door intfc for reading SGE Contexts */
+	bool trace_rss;	/* 1 implies that different RSS flit per filter is
 			 * used per filter else if 0 default RSS flit is
 			 * used for all 4 filters.
 			 */
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 12542144fe12..b6a08177b6ee 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -680,7 +680,7 @@ struct ath10k {
 	bool monitor_started;
 	unsigned int filter_flags;
 	unsigned long dev_flags;
-	u32 dfs_block_radar_events;
+	bool dfs_block_radar_events;
 
 	/* protected by conf_mutex */
 	bool radar_enabled;
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index fa6e89e5c421..ba12f7f4061d 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -1367,7 +1367,7 @@ struct ath5k_hw {
 	u8			ah_retry_long;
 	u8			ah_retry_short;
 
-	u32			ah_use_32khz_clock;
+	bool			ah_use_32khz_clock;
 
 	u8			ah_coverage_class;
 	bool			ah_ack_bitrate_high;
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 1dd0339de372..8823fadada89 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -385,7 +385,7 @@ static void ath9k_hw_init_config(struct ath_hw *ah)
 
 	ah->config.dma_beacon_response_time = 1;
 	ah->config.sw_beacon_response_time = 6;
-	ah->config.cwm_ignore_extcca = 0;
+	ah->config.cwm_ignore_extcca = false;
 	ah->config.analog_shiftreg = 1;
 
 	ah->config.rx_intr_mitigation = true;
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index e8454db17634..52971b48ab6a 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -332,14 +332,14 @@ enum ath9k_hw_hang_checks {
 struct ath9k_ops_config {
 	int dma_beacon_response_time;
 	int sw_beacon_response_time;
-	u32 cwm_ignore_extcca;
+	bool cwm_ignore_extcca;
 	u32 pcie_waen;
 	u8 analog_shiftreg;
 	u32 ofdm_trig_low;
 	u32 ofdm_trig_high;
 	u32 cck_trig_high;
 	u32 cck_trig_low;
-	u32 enable_paprd;
+	bool enable_paprd;
 	int serialize_regmode;
 	bool rx_intr_mitigation;
 	bool tx_intr_mitigation;
diff --git a/drivers/net/wireless/b43/debugfs.c b/drivers/net/wireless/b43/debugfs.c
index e807bd930647..b4bcd94aff6c 100644
--- a/drivers/net/wireless/b43/debugfs.c
+++ b/drivers/net/wireless/b43/debugfs.c
@@ -676,15 +676,15 @@ static void b43_add_dynamic_debug(struct b43_wldev *dev)
 		e->dyn_debug_dentries[id] = d;		\
 				} while (0)
 
-	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
-	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
-	add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
-	add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
-	add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
-	add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
-	add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
-	add_dyn_dbg("debug_keys", B43_DBG_KEYS, 0);
-	add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, 0);
+	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, false);
+	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, false);
+	add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, false);
+	add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, false);
+	add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, false);
+	add_dyn_dbg("debug_lo", B43_DBG_LO, false);
+	add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, false);
+	add_dyn_dbg("debug_keys", B43_DBG_KEYS, false);
+	add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, false);
 
 #undef add_dyn_dbg
 }
diff --git a/drivers/net/wireless/b43/debugfs.h b/drivers/net/wireless/b43/debugfs.h
index 50517b801cb4..d05377745011 100644
--- a/drivers/net/wireless/b43/debugfs.h
+++ b/drivers/net/wireless/b43/debugfs.h
@@ -68,7 +68,7 @@ struct b43_dfsentry {
 	u32 shm32read_addr_next;
 
 	/* Enabled/Disabled list for the dynamic debugging features. */
-	u32 dyn_debug[__B43_NR_DYNDBG];
+	bool dyn_debug[__B43_NR_DYNDBG];
 	/* Dentries for the dynamic debugging entries. */
 	struct dentry *dyn_debug_dentries[__B43_NR_DYNDBG];
 };
diff --git a/drivers/net/wireless/b43legacy/debugfs.c b/drivers/net/wireless/b43legacy/debugfs.c
index 1965edb765a2..090910ea259e 100644
--- a/drivers/net/wireless/b43legacy/debugfs.c
+++ b/drivers/net/wireless/b43legacy/debugfs.c
@@ -369,11 +369,11 @@ static void b43legacy_add_dynamic_debug(struct b43legacy_wldev *dev)
 		e->dyn_debug_dentries[id] = d;		\
 				} while (0)
 
-	add_dyn_dbg("debug_xmitpower", B43legacy_DBG_XMITPOWER, 0);
-	add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, 0);
-	add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, 0);
-	add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, 0);
-	add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, 0);
+	add_dyn_dbg("debug_xmitpower", B43legacy_DBG_XMITPOWER, false);
+	add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, false);
+	add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, false);
+	add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, false);
+	add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, false);
 
 #undef add_dyn_dbg
 }
diff --git a/drivers/net/wireless/b43legacy/debugfs.h b/drivers/net/wireless/b43legacy/debugfs.h
index ae3b0d0fa849..9ee32158b947 100644
--- a/drivers/net/wireless/b43legacy/debugfs.h
+++ b/drivers/net/wireless/b43legacy/debugfs.h
@@ -47,7 +47,7 @@ struct b43legacy_dfsentry {
 	struct b43legacy_txstatus_log txstatlog;
 
 	/* Enabled/Disabled list for the dynamic debugging features. */
-	u32 dyn_debug[__B43legacy_NR_DYNDBG];
+	bool dyn_debug[__B43legacy_NR_DYNDBG];
 	/* Dentries for the dynamic debugging entries. */
 	struct dentry *dyn_debug_dentries[__B43legacy_NR_DYNDBG];
 };
diff --git a/drivers/net/wireless/iwlegacy/common.h b/drivers/net/wireless/iwlegacy/common.h
index 5b972798bdff..ce52cf114fde 100644
--- a/drivers/net/wireless/iwlegacy/common.h
+++ b/drivers/net/wireless/iwlegacy/common.h
@@ -1425,9 +1425,9 @@ struct il_priv {
 #endif				/* CONFIG_IWLEGACY_DEBUGFS */
 
 	struct work_struct txpower_work;
-	u32 disable_sens_cal;
-	u32 disable_chain_noise_cal;
-	u32 disable_tx_power_cal;
+	bool disable_sens_cal;
+	bool disable_chain_noise_cal;
+	bool disable_tx_power_cal;
 	struct work_struct run_time_calib_work;
 	struct timer_list stats_periodic;
 	struct timer_list watchdog;
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index b95a07ec9e36..72e8a03a5293 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -649,7 +649,7 @@ struct iwl_mvm {
 	const struct iwl_fw_bcast_filter *bcast_filters;
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 	struct {
-		u32 override; /* u32 for debugfs_create_bool */
+		bool override;
 		struct iwl_bcast_filter_cmd cmd;
 	} dbgfs_bcast_filtering;
 #endif
@@ -673,7 +673,7 @@ struct iwl_mvm {
 	bool disable_power_off;
 	bool disable_power_off_d3;
 
-	u32 scan_iter_notif_enabled; /* must be u32 for debugfs_create_bool */
+	bool scan_iter_notif_enabled;
 
 	struct debugfs_blob_wrapper nvm_hw_blob;
 	struct debugfs_blob_wrapper nvm_sw_blob;
@@ -729,7 +729,7 @@ struct iwl_mvm {
 	int n_nd_channels;
 	bool net_detect;
 #ifdef CONFIG_IWLWIFI_DEBUGFS
-	u32 d3_wake_sysassert; /* must be u32 for debugfs_create_bool */
+	bool d3_wake_sysassert;
 	bool d3_test_active;
 	bool store_d3_resume_sram;
 	void *d3_resume_sram;
diff --git a/drivers/scsi/snic/snic_trc.c b/drivers/scsi/snic/snic_trc.c
index 28a40a7ade38..f00ebf4717e0 100644
--- a/drivers/scsi/snic/snic_trc.c
+++ b/drivers/scsi/snic/snic_trc.c
@@ -148,7 +148,7 @@ snic_trc_init(void)
 
 	trc->max_idx = (tbuf_sz / SNIC_TRC_ENTRY_SZ);
 	trc->rd_idx = trc->wr_idx = 0;
-	trc->enable = 1;
+	trc->enable = true;
 	SNIC_INFO("Trace Facility Enabled.\n Trace Buffer SZ %lu Pages.\n",
 		  tbuf_sz / PAGE_SIZE);
 	ret = 0;
@@ -169,7 +169,7 @@ snic_trc_free(void)
 {
 	struct snic_trc *trc = &snic_glob->trc;
 
-	trc->enable = 0;
+	trc->enable = false;
 	snic_trc_debugfs_term();
 
 	if (trc->buf) {
diff --git a/drivers/scsi/snic/snic_trc.h b/drivers/scsi/snic/snic_trc.h
index 427faee5f97e..b37f8867bfde 100644
--- a/drivers/scsi/snic/snic_trc.h
+++ b/drivers/scsi/snic/snic_trc.h
@@ -45,7 +45,7 @@ struct snic_trc {
 	u32	max_idx;		/* Max Index into trace buffer */
 	u32	rd_idx;
 	u32	wr_idx;
-	u32	enable;			/* Control Variable for Tracing */
+	bool	enable;			/* Control Variable for Tracing */
 
 	struct dentry *trc_enable;	/* debugfs file object */
 	struct dentry *trc_file;
diff --git a/drivers/uwb/uwb-debug.c b/drivers/uwb/uwb-debug.c
index 0b1e5a9449b5..991374b13571 100644
--- a/drivers/uwb/uwb-debug.c
+++ b/drivers/uwb/uwb-debug.c
@@ -55,7 +55,7 @@
 struct uwb_dbg {
 	struct uwb_pal pal;
 
-	u32 accept;
+	bool accept;
 	struct list_head rsvs;
 
 	struct dentry *root_d;
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 6c55ade071c3..b70c20fae502 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -439,7 +439,7 @@ ssize_t debugfs_read_file_bool(struct file *file, char __user *user_buf,
 			       size_t count, loff_t *ppos)
 {
 	char buf[3];
-	u32 *val = file->private_data;
+	bool *val = file->private_data;
 
 	if (*val)
 		buf[0] = 'Y';
@@ -457,7 +457,7 @@ ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf,
 	char buf[32];
 	size_t buf_size;
 	bool bv;
-	u32 *val = file->private_data;
+	bool *val = file->private_data;
 
 	buf_size = min(count, (sizeof(buf)-1));
 	if (copy_from_user(buf, user_buf, buf_size))
@@ -503,7 +503,7 @@ static const struct file_operations fops_bool = {
  * code.
  */
 struct dentry *debugfs_create_bool(const char *name, umode_t mode,
-				   struct dentry *parent, u32 *value)
+				   struct dentry *parent, bool *value)
 {
 	return debugfs_create_file(name, mode, parent, value, &fops_bool);
 }
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index 9beb636b97eb..8321fe3058d6 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -92,7 +92,7 @@ struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
 struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
 				     struct dentry *parent, atomic_t *value);
 struct dentry *debugfs_create_bool(const char *name, umode_t mode,
-				  struct dentry *parent, u32 *value);
+				  struct dentry *parent, bool *value);
 
 struct dentry *debugfs_create_blob(const char *name, umode_t mode,
 				  struct dentry *parent,
@@ -243,7 +243,7 @@ static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t m
 
 static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
 						 struct dentry *parent,
-						 u32 *value)
+						 bool *value)
 {
 	return ERR_PTR(-ENODEV);
 }
diff --git a/include/linux/edac.h b/include/linux/edac.h
index da3b72e95db3..7c6b7ba55589 100644
--- a/include/linux/edac.h
+++ b/include/linux/edac.h
@@ -772,7 +772,7 @@ struct mem_ctl_info {
 #ifdef CONFIG_EDAC_DEBUG
 	struct dentry *debugfs;
 	u8 fake_inject_layer[EDAC_MAX_LAYERS];
-	u32 fake_inject_ue;
+	bool fake_inject_ue;
 	u16 fake_inject_count;
 #endif
 };
diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index 798fad9e420d..3159a7dba034 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -18,7 +18,7 @@ struct fault_attr {
 	atomic_t times;
 	atomic_t space;
 	unsigned long verbose;
-	u32 task_filter;
+	bool task_filter;
 	unsigned long stacktrace_depth;
 	unsigned long require_start;
 	unsigned long require_end;
diff --git a/kernel/futex.c b/kernel/futex.c
index 6e443efc65f4..395b967841b4 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -267,10 +267,10 @@ static struct futex_hash_bucket *futex_queues;
 static struct {
 	struct fault_attr attr;
 
-	u32 ignore_private;
+	bool ignore_private;
 } fail_futex = {
 	.attr = FAULT_ATTR_INITIALIZER,
-	.ignore_private = 0,
+	.ignore_private = false,
 };
 
 static int __init setup_fail_futex(char *str)
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index dace71fe41f7..fcb65d2a0b94 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -100,7 +100,7 @@ static LIST_HEAD(free_entries);
 static DEFINE_SPINLOCK(free_entries_lock);
 
 /* Global disable flag - will be set in case of an error */
-static u32 global_disable __read_mostly;
+static bool global_disable __read_mostly;
 
 /* Early initialization disable flag, set at the end of dma_debug_init */
 static bool dma_debug_initialized __read_mostly;
diff --git a/mm/failslab.c b/mm/failslab.c
index fefaabaab76d..98fb490311eb 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -3,12 +3,12 @@
 
 static struct {
 	struct fault_attr attr;
-	u32 ignore_gfp_wait;
-	int cache_filter;
+	bool ignore_gfp_wait;
+	bool cache_filter;
 } failslab = {
 	.attr = FAULT_ATTR_INITIALIZER,
-	.ignore_gfp_wait = 1,
-	.cache_filter = 0,
+	.ignore_gfp_wait = true,
+	.cache_filter = false,
 };
 
 bool should_failslab(size_t size, gfp_t gfpflags, unsigned long cache_flags)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 48aaf7b9f253..805bbad2e24e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2159,13 +2159,13 @@ struct page *buffered_rmqueue(struct zone *preferred_zone,
 static struct {
 	struct fault_attr attr;
 
-	u32 ignore_gfp_highmem;
-	u32 ignore_gfp_wait;
+	bool ignore_gfp_highmem;
+	bool ignore_gfp_wait;
 	u32 min_order;
 } fail_page_alloc = {
 	.attr = FAULT_ATTR_INITIALIZER,
-	.ignore_gfp_wait = 1,
-	.ignore_gfp_highmem = 1,
+	.ignore_gfp_wait = true,
+	.ignore_gfp_highmem = true,
 	.min_order = 1,
 };
 
diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h
index 579a6350fb01..2d117cf0e953 100644
--- a/sound/soc/codecs/wm_adsp.h
+++ b/sound/soc/codecs/wm_adsp.h
@@ -53,7 +53,7 @@ struct wm_adsp {
 
 	int fw;
 	int fw_ver;
-	u32 running;
+	bool running;
 
 	struct list_head ctl_list;
 
-- 
2.4.0

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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Viresh Kumar]

On 15-09-15, 09:45, Steven Rostedt wrote:
> Then break up the patch.

That will cause build warnings between the patches due to prototype
mismatch. Maybe I should ignore get_maintainers for this patch and
just cc the lists :)

> Your Cc list is far too large, I would nack
> this patch just for that alone.

:(

> Sad part is, you didn't even Cc Linus (which I added). I believe he was
> against having bool's in structures before.

Sorry about that, I had no clue that I should explicitly include Linus
to this thread.

> Linus, This patch changes a lot of u32s into bools in structures.
> What's your take on that?
> 
> I added the patch again to the bottom of this email so that Linus may
> see it (it was cut from the email I'm replying to).

Thanks Steven.

-- 
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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Linus Torvalds]

On Tue, Sep 15, 2015 at 6:45 AM, Steven Rostedt <rostedt@goodmis.org> wrote:
>
> Linus, This patch changes a lot of u32s into bools in structures.
> What's your take on that?

So in general, I'd tend to prefer "bool" to be used primarily as a
return value for functions, but I have to say, in the case of
something that is explicitly called "debugfs_create_bool()" it kind of
makes sense to actually take a bool pointer.

In structures, it depends a bit on usage. If the intent is to pack
things better, I tend to prefer using "char" etc that is explicitly a
byte. Or just use explicit bits in an "unsigned int flags" or
something. Because while "bool" is _typically_ one byte, but it's very
very explicitly documented to not be guaranteed that way, and there
are legacy models where "bool" ends up being "int".

But in this case, the use of "bool" is not about packing or anything
like that, it is more about the logical data type for
"debugfs_create_bool()", and so I don't mind "bool" in this context
even in structures.

But exactly because of the whole ambiguoity about "bool", what I do
*not* want to see in any way is "bool" in structures that are exported
to user space. That's when we want primarily those explicitly sized
types like "u32" etc. We should generally try to avoid even things
like "int" in those kinds of structures, and bool is even _less_ well
defined than "int" is.

But that user interface issue doesn't seem to be the case here, an I
can't say that I mind the patch. It looks fairly sane.

                    Linus

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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Steven Rostedt]

On Tue, 15 Sep 2015 10:38:32 -0700
Linus Torvalds <torvalds@linux-foundation.org> wrote:


> But that user interface issue doesn't seem to be the case here, an I
> can't say that I mind the patch. It looks fairly sane.

If Linus is fine with it, I'm fine with it too.

But please, next time, go easy on the Cc list. Maybe just use bcc for
those not on the list, stating that you BCC'd a lot of people to make
sure this is sane, but didn't want to spam everyone with every reply.

What do others think when there's a change that goes across the board
this much? BCC OK with you, as just an FYI, I'm doing this? Or should
just the lists be enough and if you don't see it, too bad?

-- Steve

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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Borislav Petkov]

On Tue, Sep 15, 2015 at 01:47:32PM -0400, Steven Rostedt wrote:
> What do others think when there's a change that goes across the board
> this much? BCC OK with you, as just an FYI, I'm doing this? Or should
> just the lists be enough and if you don't see it, too bad?

Bcc sounds good to me.

(Let's see how many bounces I get when I reply to such a huge CC list.
:-))

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Ingo Molnar]

* Steven Rostedt <rostedt@goodmis.org> wrote:

> But please, next time, go easy on the Cc list. Maybe just use bcc for those not 
> on the list, stating that you BCC'd a lot of people to make sure this is sane, 
> but didn't want to spam everyone with every reply.

Not just that, such a long Cc: list is a semi-guarantee that various list engines 
(vger included I think) would drop the mail as spam and nobody else would get the 
mail...

Thanks,

	Ingo

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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Steven Rostedt]

On Tue, 15 Sep 2015 14:04:59 +0530
Viresh Kumar <viresh.kumar@linaro.org> wrote:

> diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
> index 2614a839c60d..f11e17ad7834 100644
> --- a/drivers/acpi/ec.c
> +++ b/drivers/acpi/ec.c
> @@ -1237,7 +1237,7 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
>  	/* Use the global lock for all EC transactions? */
>  	tmp = 0;
>  	acpi_evaluate_integer(handle, "_GLK", NULL, &tmp);
> -	ec->global_lock = tmp;
> +	ec->global_lock = !!tmp;

BTW, the above is equivalent if global_lock is of type bool.

-- Steve

>  	ec->handle = handle;
>  	return AE_CTRL_TERMINATE;
>  }
> diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
> index 9db196de003c..5a72e2b140fc 100644
> --- a/drivers/acpi/internal.h
> +++ b/drivers/acpi/internal.h
> @@ -138,7 +138,7 @@ struct acpi_ec {
>  	unsigned long gpe;
>  	unsigned long command_addr;
>  	unsigned long data_addr;
> -	u32 global_lock;
> +	bool global_lock;
>  	unsigned long flags;
>  	unsigned long reference_count;
>  	struct mutex mutex;

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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Viresh Kumar]

On 15-09-15, 10:04, Steven Rostedt wrote:
> On Tue, 15 Sep 2015 14:04:59 +0530
> Viresh Kumar <viresh.kumar@linaro.org> wrote:
> 
> > diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
> > index 2614a839c60d..f11e17ad7834 100644
> > --- a/drivers/acpi/ec.c
> > +++ b/drivers/acpi/ec.c
> > @@ -1237,7 +1237,7 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
> >  	/* Use the global lock for all EC transactions? */
> >  	tmp = 0;
> >  	acpi_evaluate_integer(handle, "_GLK", NULL, &tmp);
> > -	ec->global_lock = tmp;
> > +	ec->global_lock = !!tmp;
> 
> BTW, the above is equivalent if global_lock is of type bool.

Ah, yes. Thanks for letting me know (I just testedit as well).

But will it look sane enough to set a boolean to anything apart from
true/false or 1/0? Yes, it will always be set to 0/1 only, but still..

-- 
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Re: [PATCH V3 2/2] debugfs: don't assume sizeof(bool) to be 4 bytes

[Tejun Heo]

Hello,

On Tue, Sep 15, 2015 at 07:42:08PM +0530, Viresh Kumar wrote:
> Ah, yes. Thanks for letting me know (I just testedit as well).
> 
> But will it look sane enough to set a boolean to anything apart from
> true/false or 1/0? Yes, it will always be set to 0/1 only, but still..

Let's please not do something unnecessary.  Everybody has different
ideas about what looks natural and the best way to achieve some
semblance of consistency is sticking with minimum unless there are
overriding concerns and there isn't any here.

Thanks.

-- 
tejun

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