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| author |   Ravi Bangoria <ravi.bangoria@linux.ibm.com> | 2020-05-14 16:47:36 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-05-19 00:11:05 +1000 |
| commit | c9e82aeb197df2d93b1b4234bc0c80943fa594e8 (patch) | |
| tree | b92a569be0da7724156c12072f3bc0a9265db965 /arch/powerpc/kernel/hw_breakpoint.c | |
| parent | powerpc/watchpoint: Use loop for thread_struct->ptrace_bps (diff) | |
| download | linux-dev-c9e82aeb197df2d93b1b4234bc0c80943fa594e8.tar.xz linux-dev-c9e82aeb197df2d93b1b4234bc0c80943fa594e8.zip | |
powerpc/watchpoint: Introduce is_ptrace_bp() function
Introduce is_ptrace_bp() function and move the check inside the
function. It will be utilize more in later set of patches.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Link: https://lore.kernel.org/r/20200514111741.97993-12-ravi.bangoria@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/hw_breakpoint.c')
| -rw-r--r-- | arch/powerpc/kernel/hw_breakpoint.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c index 917cca73dbc3..8028a2704874 100644 --- a/arch/powerpc/kernel/hw_breakpoint.c +++ b/arch/powerpc/kernel/hw_breakpoint.c @@ -91,6 +91,11 @@ 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 @@ -325,7 +330,7 @@ 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; |