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Subject[PATCH 11/15] powerpc/watchpoint: Introduce is_ptrace_bp() function
Date
Introduce is_ptrace_bp() function and move the check inside the
function. We will utilize it more in later set of patches.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
arch/powerpc/kernel/hw_breakpoint.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index b27aca623267..0e35ff372d8e 100644
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c
@@ -90,6 +90,11 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp)
hw_breakpoint_disable();
}

+static bool is_ptrace_bp(struct perf_event *bp)
+{
+ return (bp->overflow_handler == ptrace_triggered);
+}
+
/*
* Perform cleanup of arch-specific counters during unregistration
* of the perf-event
@@ -324,7 +329,7 @@ int hw_breakpoint_handler(struct die_args *args)
* one-shot mode. The ptrace-ed process will receive the SIGTRAP signal
* generated in do_dabr().
*/
- if (bp->overflow_handler == ptrace_triggered) {
+ if (is_ptrace_bp(bp)) {
perf_bp_event(bp, regs);
rc = NOTIFY_DONE;
goto out;
--
2.21.1
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