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| author | Ingo Molnar <mingo@kernel.org> | 2018-03-29 16:03:48 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-29 16:03:48 +0200 |
| commit | 2d074918fb1568f398777343ff9a28049fb86337 (patch) | |
| tree | 84277c1471f6d575a9515d42a53345666addabc8 /kernel/fail_function.c | |
| parent | Merge tag 'perf-core-for-mingo-4.17-20180328' of git://git.kernel.org/pub/scm... (diff) | |
| parent | perf/hwbp: Simplify the perf-hwbp code, fix documentation (diff) | |
| download | linux-2d074918fb1568f398777343ff9a28049fb86337.tar.gz linux-2d074918fb1568f398777343ff9a28049fb86337.zip | |
Merge branch 'perf/urgent' into perf/core
Conflicts:
kernel/events/hw_breakpoint.c
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/fail_function.c')
| -rw-r--r-- | kernel/fail_function.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/fail_function.c b/kernel/fail_function.c index 21b0122cb39c..1d5632d8bbcc 100644 --- a/kernel/fail_function.c +++ b/kernel/fail_function.c @@ -14,6 +14,15 @@ static int fei_kprobe_handler(struct kprobe *kp, struct pt_regs *regs); +static void fei_post_handler(struct kprobe *kp, struct pt_regs *regs, + unsigned long flags) +{ + /* + * A dummy post handler is required to prohibit optimizing, because + * jump optimization does not support execution path overriding. + */ +} + struct fei_attr { struct list_head list; struct kprobe kp; @@ -56,6 +65,7 @@ static struct fei_attr *fei_attr_new(const char *sym, unsigned long addr) return NULL; } attr->kp.pre_handler = fei_kprobe_handler; + attr->kp.post_handler = fei_post_handler; attr->retval = adjust_error_retval(addr, 0); INIT_LIST_HEAD(&attr->list); } |