From: Paul Walmsley <paul@pwsan.com>
To: linux-omap@vger.kernel.org
Cc: Paul Walmsley <paul@pwsan.com>
Subject: [PATCH v2 15/23] OMAP clock: drop clk_get_usecount()
Date: Sun, 04 Jan 2009 19:34:57 -0700 [thread overview]
Message-ID: <20090105023456.12661.87847.stgit@localhost.localdomain> (raw)
In-Reply-To: <20090105022953.12661.57701.stgit@localhost.localdomain>
This function is race-prone and mistakenly conveys the impression to
drivers that it is part of the clock interface. Get rid of it: core
code that absolutely needs this can just check clk->usecount. Drivers
should not use it at all.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
---
arch/arm/mach-omap2/pm-debug.c | 2 +-
arch/arm/mach-omap2/pm24xx.c | 2 +-
arch/arm/plat-omap/clock.c | 16 ----------------
arch/arm/plat-omap/include/mach/clock.h | 1 -
4 files changed, 2 insertions(+), 19 deletions(-)
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index 0b5c044..0832e05 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -93,7 +93,7 @@ void serial_console_sleep(int enable)
if (enable) {
BUG_ON(serial_console_clock_disabled);
- if (clk_get_usecount(console_fclk) == 0)
+ if (console_fclk->usecount == 0)
return;
if ((int) serial_console_next_disable - (int) omap2_read_32k_sync_counter() >= 0)
return;
diff --git a/arch/arm/mach-omap2/pm24xx.c b/arch/arm/mach-omap2/pm24xx.c
index 60ff04f..2798e87 100644
--- a/arch/arm/mach-omap2/pm24xx.c
+++ b/arch/arm/mach-omap2/pm24xx.c
@@ -249,7 +249,7 @@ static int omap2_can_sleep(void)
return 0;
if (atomic_read(&sleep_block) > 0)
return 0;
- if (clk_get_usecount(osc_ck) > 1)
+ if (osc_ck->usecount > 1)
return 0;
if (omap_dma_running())
return 0;
diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index ab3d879..8d43d78 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -260,22 +260,6 @@ out:
}
EXPORT_SYMBOL(clk_disable);
-int clk_get_usecount(struct clk *clk)
-{
- unsigned long flags;
- int ret = 0;
-
- if (clk == NULL || IS_ERR(clk))
- return 0;
-
- spin_lock_irqsave(&clockfw_lock, flags);
- ret = clk->usecount;
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(clk_get_usecount);
-
unsigned long clk_get_rate(struct clk *clk)
{
unsigned long flags;
diff --git a/arch/arm/plat-omap/include/mach/clock.h b/arch/arm/plat-omap/include/mach/clock.h
index 9d38a25..2a30268 100644
--- a/arch/arm/plat-omap/include/mach/clock.h
+++ b/arch/arm/plat-omap/include/mach/clock.h
@@ -142,7 +142,6 @@ extern void followparent_recalc(struct clk *clk, unsigned long parent_rate,
u8 rate_storage);
extern void clk_allow_idle(struct clk *clk);
extern void clk_deny_idle(struct clk *clk);
-extern int clk_get_usecount(struct clk *clk);
extern void clk_enable_init_clocks(void);
#ifdef CONFIG_CPU_FREQ
extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
next prev parent reply other threads:[~2009-01-05 3:22 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-05 2:34 [PATCH v2 00/23] OMAP clock: bug fixes, cleanup, optimization Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 01/23] OMAP2/3 clock: use standard set_rate fn in omap2_clk_arch_init() Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 02/23] OMAP clock: move rate recalc, propagation code up to plat-omap/clock.c Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 04/23] OMAP clock: support "dry run" rate and parent changes Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 03/23] OMAP2/3 clock: drop recalc function pointers from fixed rate clocks Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 05/23] OMAP clock: track child clocks Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 06/23] OMAP clock: drop the RATE_PROPAGATES flag Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 07/23] OMAP clock: drop RATE_FIXED Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 09/23] OMAP2 clock: drop CONFIG_PARTICIPANT clock flag Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 08/23] OMAP clock: remove VIRTUAL_CLOCK Paul Walmsley
2009-01-06 2:03 ` Kevin Hilman
2009-01-06 2:34 ` Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 10/23] OMAP2/3 clock: remove clk->owner Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 12/23] OMAP2/3 clock: don't use a barrier after clk_disable() Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 11/23] OMAP clock: rearrange clock.h structure order Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 13/23] OMAP2xxx clock: consolidate DELAYED_APP clock commits; fix barrier Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 14/23] OMAP2/3 clock: convert remaining MPU barriers into OCP barriers Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 16/23] OMAP clock: add OMAP chip family-specific clk_register() option Paul Walmsley
2009-01-05 2:34 ` Paul Walmsley [this message]
2009-01-05 2:34 ` [PATCH v2 17/23] OMAP2/3 clock: every clock must have a clkdm Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 18/23] OMAP2/3 clock: omap2_clk_enable(): refactor usecount check Paul Walmsley
2009-01-05 2:34 ` [PATCH v2 19/23] OMAP2/3 clock: omap2_clk_enable(): fix bugs in clockdomain handling Paul Walmsley
2009-01-05 2:35 ` [PATCH v2 20/23] OMAP2/3 clock: omap2_clk_enable(): fix usecount decrement bug Paul Walmsley
[not found] ` <2ee9e08d0901060342q36a5ebd2i448d87ba55bb034d@mail.gmail.com>
2009-01-06 11:43 ` Fwd: " Anuj Aggarwal
2009-01-05 2:35 ` [PATCH v2 21/23] OMAP2/3 clock: omap2_clk_enable(): fix logic Paul Walmsley
2009-01-05 2:35 ` [PATCH v2 22/23] OMAP2/3 clock: don't tinker with hardirqs when they are supposed to be disabled Paul Walmsley
2009-01-05 2:35 ` [PATCH v2 23/23] OMAP3 SmartReflex: get rid of custom clocks Paul Walmsley
2009-01-07 15:46 ` [PATCH v2 00/23] OMAP clock: bug fixes, cleanup, optimization Tony Lindgren
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