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kernel/hw_breakpoint.c: Fix local/global shadowing 

If the new percpu tree is combined with the perf events tree
the following new warning triggers:

 kernel/hw_breakpoint.c: In function 'toggle_bp_task_slot':
 kernel/hw_breakpoint.c:151: warning: 'task_bp_pinned' is used uninitialized in this function

Because it's not valid anymore to define a local variable
and a percpu variable (even if it's file scope local) with
the same name.

Rename the local variable to resolve this.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <200911260701.nAQ71owx016356@imap1.linux-foundation.org>
[ v2: added changelog ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Andrew Morton 2009-11-25 23:01:50 -08:00 committed by Ingo Molnar
parent 2c31b7958f
commit 11e6635763
1 changed files with 6 additions and 6 deletions
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12
kernel/hw_breakpoint.c
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@ -121,7 +121,7 @@ static void toggle_bp_task_slot(struct task_struct *tsk, int cpu, bool enable)
int count = 0;
struct perf_event *bp;
struct perf_event_context *ctx = tsk->perf_event_ctxp;
unsigned int *task_bp_pinned;
unsigned int *tsk_pinned;
struct list_head *list;
unsigned long flags;
@ -146,15 +146,15 @@ static void toggle_bp_task_slot(struct task_struct *tsk, int cpu, bool enable)
if (WARN_ONCE(count < 0, "No breakpoint counter found in the counter list"))
return;
task_bp_pinned = per_cpu(task_bp_pinned, cpu);
tsk_pinned = per_cpu(task_bp_pinned, cpu);
if (enable) {
task_bp_pinned[count]++;
tsk_pinned[count]++;
if (count > 0)
task_bp_pinned[count-1]--;
tsk_pinned[count-1]--;
} else {
task_bp_pinned[count]--;
tsk_pinned[count]--;
if (count > 0)
task_bp_pinned[count-1]++;
tsk_pinned[count-1]++;
}
}