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authorFrederic Weisbecker <fweisbec@gmail.com>2009-11-26 05:35:42 +0100
committerIngo Molnar <mingo@elte.hu>2009-11-26 09:29:21 +0100
commit605bfaee9078cd0b01d83402315389839ee4bb5c (patch)
tree35c3af269b37347b689b3b212fc99d4ae9f719e5 /kernel/hw_breakpoint.c
parentc6567f642e20bcc79abed030f44be5b0d6da2ded (diff)
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hw-breakpoints: Simplify error handling in breakpoint creation requests
This simplifies the error handling when we create a breakpoint. We don't need to check the NULL return value corner case anymore since we have improved perf_event_create_kernel_counter() to always return an error code in the failure case. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <1259210142-5714-3-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/hw_breakpoint.c')
-rw-r--r--kernel/hw_breakpoint.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c
index 06d372fc026..dd3fb4a999d 100644
--- a/kernel/hw_breakpoint.c
+++ b/kernel/hw_breakpoint.c
@@ -442,7 +442,7 @@ register_wide_hw_breakpoint(unsigned long addr,
*pevent = bp;
- if (IS_ERR(bp) || !bp) {
+ if (IS_ERR(bp)) {
err = PTR_ERR(bp);
goto fail;
}
@@ -453,7 +453,7 @@ register_wide_hw_breakpoint(unsigned long addr,
fail:
for_each_possible_cpu(cpu) {
pevent = per_cpu_ptr(cpu_events, cpu);
- if (IS_ERR(*pevent) || !*pevent)
+ if (IS_ERR(*pevent))
break;
unregister_hw_breakpoint(*pevent);
}