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clk: Silence warnings about lock imbalances

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The recursive spinlock implementation trips up sparse and it
complains that these functions have lock imbalances. That isn't
really true though, so add some __acquires() and __releases()
information so that sparse is quiet.

drivers/clk/clk.c:116:22: warning: context imbalance in 'clk_enable_lock' - wrong count at exit
drivers/clk/clk.c:141:9: warning: context imbalance in 'clk_enable_unlock' - unexpected unlock

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Stephen Boyd 2015-07-24 12:24:48 -07:00
parent 661e2180cf
commit a57aa18539
1 changed files with 6 additions and 1 deletions
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7
drivers/clk/clk.c
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@ -114,12 +114,14 @@ static void clk_prepare_unlock(void)
}
static unsigned long clk_enable_lock(void)
__acquires(enable_lock)
{
unsigned long flags;
if (!spin_trylock_irqsave(&enable_lock, flags)) {
if (enable_owner == current) {
enable_refcnt++;
__acquire(enable_lock);
return flags;
}
spin_lock_irqsave(&enable_lock, flags);
@ -132,12 +134,15 @@ static unsigned long clk_enable_lock(void)
}
static void clk_enable_unlock(unsigned long flags)
__releases(enable_lock)
{
WARN_ON_ONCE(enable_owner != current);
WARN_ON_ONCE(enable_refcnt == 0);
if (--enable_refcnt)
if (--enable_refcnt) {
__release(enable_lock);
return;
}
enable_owner = NULL;
spin_unlock_irqrestore(&enable_lock, flags);
}