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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2009-10-01 10:01:55 +0300 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-10-05 10:51:00 -0700 |
| commit | ee894b18e064447f86019af38a90ccb091880942 (patch) | |
| tree | 72bf9758711530e0f22d41cb56d7ad92f6439268 /arch/arm/plat-omap | |
| parent | eb350f74ebff9573641c5fb689fb071b695ef35b (diff) | |
| download | linux-stable-ee894b18e064447f86019af38a90ccb091880942.tar.gz linux-stable-ee894b18e064447f86019af38a90ccb091880942.tar.bz2 linux-stable-ee894b18e064447f86019af38a90ccb091880942.zip | |
OMAP3: PM: introduce a new powerdomain walk helper
The 'pwrdm_for_each()' function walks powerdomains with a spinlock
locked, so the the callbacks cannot do anything which may sleep.
This patch introduces a 'pwrdm_for_each_nolock()' helper which does
the same, but without the spinlock locked. This fixes the following
lockdep warning:
[ 0.000000] WARNING: at kernel/lockdep.c:2460 lockdep_trace_alloc+0xac/0xec()
[ 0.000000] Modules linked in:
(unwind_backtrace+0x0/0xdc) from [<c0045464>] (warn_slowpath_common+0x48/0x60)
(warn_slowpath_common+0x48/0x60) from [<c0067dd4>] (lockdep_trace_alloc+0xac/0xec)
(lockdep_trace_alloc+0xac/0xec) from [<c009da14>] (kmem_cache_alloc+0x1c/0xd0)
(kmem_cache_alloc+0x1c/0xd0) from [<c00b21d8>] (d_alloc+0x1c/0x1a4)
(d_alloc+0x1c/0x1a4) from [<c00a887c>] (__lookup_hash+0xd8/0x118)
(__lookup_hash+0xd8/0x118) from [<c00a9f20>] (lookup_one_len+0x84/0x94)
(lookup_one_len+0x84/0x94) from [<c010d12c>] (debugfs_create_file+0x8c/0x20c)
(debugfs_create_file+0x8c/0x20c) from [<c010d320>] (debugfs_create_dir+0x1c/0x20)
(debugfs_create_dir+0x1c/0x20) from [<c000e8cc>] (pwrdms_setup+0x60/0x90)
(pwrdms_setup+0x60/0x90) from [<c002e010>] (pwrdm_for_each+0x30/0x80)
(pwrdm_for_each+0x30/0x80) from [<c000e79c>] (pm_dbg_init+0x7c/0x14c)
(pm_dbg_init+0x7c/0x14c) from [<c00232b4>] (do_one_initcall+0x5c/0x1b8)
(do_one_initcall+0x5c/0x1b8) from [<c00083f8>] (kernel_init+0x90/0x10c)
(kernel_init+0x90/0x10c) from [<c00242c4>] (kernel_thread_exit+0x0/0x8)
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/include/mach/powerdomain.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/mach/powerdomain.h b/arch/arm/plat-omap/include/mach/powerdomain.h index 6271d8556a40..fa6461423bd0 100644 --- a/arch/arm/plat-omap/include/mach/powerdomain.h +++ b/arch/arm/plat-omap/include/mach/powerdomain.h @@ -135,6 +135,8 @@ struct powerdomain *pwrdm_lookup(const char *name); int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), void *user); +int pwrdm_for_each_nolock(int (*fn)(struct powerdomain *pwrdm, void *user), + void *user); int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm); int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm); |