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From: Eliav Farber <farbere@amazon.com>
To: <gregkh@linuxfoundation.org>, <sashal@kernel.org>,
	<mario.limonciello@amd.com>, <lijo.lazar@amd.com>,
	<David.Laight@ACULAB.COM>, <arnd@kernel.org>,
	<linux-kernel@vger.kernel.org>, <stable@vger.kernel.org>,
	<farbere@amazon.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	David Laight <David.Laight@aculab.com>,
	Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Subject: [PATCH v2 04/13 6.1.y] minmax: don't use max() in situations that want a C constant expression
Date: Mon, 29 Sep 2025 18:33:49 +0000	[thread overview]
Message-ID: <20250929183358.18982-5-farbere@amazon.com> (raw)
In-Reply-To: <20250929183358.18982-1-farbere@amazon.com>

From: Linus Torvalds <torvalds@linux-foundation.org>

[ Upstream commit cb04e8b1d2f24c4c2c92f7b7529031fc35a16fed ]

We only had a couple of array[] declarations, and changing them to just
use 'MAX()' instead of 'max()' fixes the issue.

This will allow us to simplify our min/max macros enormously, since they
can now unconditionally use temporary variables to avoid using the
argument values multiple times.

Cc: David Laight <David.Laight@aculab.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Eliav Farber <farbere@amazon.com>
---
 drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c   | 2 +-
 drivers/input/touchscreen/cyttsp4_core.c | 2 +-
 drivers/irqchip/irq-sun6i-r.c            | 2 +-
 fs/btrfs/tree-checker.c                  | 2 +-
 lib/vsprintf.c                           | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
index 768b6e7dbd77..fd1faa840ec0 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
@@ -700,7 +700,7 @@ static const char *smu_get_feature_name(struct smu_context *smu,
 size_t smu_cmn_get_pp_feature_mask(struct smu_context *smu,
 				   char *buf)
 {
-	int8_t sort_feature[max(SMU_FEATURE_COUNT, SMU_FEATURE_MAX)];
+	int8_t sort_feature[MAX(SMU_FEATURE_COUNT, SMU_FEATURE_MAX)];
 	uint64_t feature_mask;
 	int i, feature_index;
 	uint32_t count = 0;
diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
index dccbcb942fe5..936d69da3bda 100644
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -871,7 +871,7 @@ static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch)
 	struct cyttsp4_touch tch;
 	int sig;
 	int i, j, t = 0;
-	int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+	int ids[MAX(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
 
 	memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
 	for (i = 0; i < num_cur_tch; i++) {
diff --git a/drivers/irqchip/irq-sun6i-r.c b/drivers/irqchip/irq-sun6i-r.c
index a01e44049415..99958d470d62 100644
--- a/drivers/irqchip/irq-sun6i-r.c
+++ b/drivers/irqchip/irq-sun6i-r.c
@@ -270,7 +270,7 @@ static const struct irq_domain_ops sun6i_r_intc_domain_ops = {
 
 static int sun6i_r_intc_suspend(void)
 {
-	u32 buf[BITS_TO_U32(max(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
+	u32 buf[BITS_TO_U32(MAX(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
 	int i;
 
 	/* Wake IRQs are enabled during system sleep and shutdown. */
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index bf3822b25c58..cb76feac94a4 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -608,7 +608,7 @@ static int check_dir_item(struct extent_buffer *leaf,
 		 */
 		if (key->type == BTRFS_DIR_ITEM_KEY ||
 		    key->type == BTRFS_XATTR_ITEM_KEY) {
-			char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
+			char namebuf[MAX(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
 
 			read_extent_buffer(leaf, namebuf,
 					(unsigned long)(di + 1), name_len);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index fa1c19701855..2b0b5f08b8fc 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1082,7 +1082,7 @@ char *resource_string(char *buf, char *end, struct resource *res,
 #define FLAG_BUF_SIZE		(2 * sizeof(res->flags))
 #define DECODED_BUF_SIZE	sizeof("[mem - 64bit pref window disabled]")
 #define RAW_BUF_SIZE		sizeof("[mem - flags 0x]")
-	char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+	char sym[MAX(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
 		     2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
 
 	char *p = sym, *pend = sym + sizeof(sym);
-- 
2.47.3


  parent reply	other threads:[~2025-09-29 18:34 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-29 18:33 [PATCH v2 00/13 6.1.y] Backport minmax.h updates from v6.17-rc7 Eliav Farber
2025-09-29 18:33 ` [PATCH v2 01/13 6.1.y] minmax: make generic MIN() and MAX() macros available everywhere Eliav Farber
2025-09-29 18:33 ` [PATCH v2 02/13 6.1.y] minmax: add a few more MIN_T/MAX_T users Eliav Farber
2025-09-29 18:33 ` [PATCH v2 03/13 6.1.y] minmax: simplify min()/max()/clamp() implementation Eliav Farber
2025-09-30 14:25   ` Greg KH
2025-09-30 14:49     ` Farber, Eliav
2025-09-29 18:33 ` Eliav Farber [this message]
2025-09-29 18:33 ` [PATCH v2 05/13 6.1.y] minmax: improve macro expansion and type checking Eliav Farber
2025-09-29 18:33 ` [PATCH v2 06/13 6.1.y] minmax: fix up min3() and max3() too Eliav Farber
2025-09-29 18:33 ` [PATCH v2 07/13 6.1.y] minmax.h: add whitespace around operators and after commas Eliav Farber
2025-09-29 18:33 ` [PATCH v2 08/13 6.1.y] minmax.h: update some comments Eliav Farber
2025-09-29 18:33 ` [PATCH v2 09/13 6.1.y] minmax.h: reduce the #define expansion of min(), max() and clamp() Eliav Farber
2025-09-29 18:33 ` [PATCH v2 10/13 6.1.y] minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp() Eliav Farber
2025-09-29 18:33 ` [PATCH v2 11/13 6.1.y] minmax.h: move all the clamp() definitions after the min/max() ones Eliav Farber
2025-09-29 18:33 ` [PATCH v2 12/13 6.1.y] minmax.h: simplify the variants of clamp() Eliav Farber
2025-09-29 18:33 ` [PATCH v2 13/13 6.1.y] minmax.h: remove some #defines that are only expanded once Eliav Farber

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