Messages in this thread Patch in this message | | | From | Muchun Song <> | Subject | [PATCH] kprobes: fix compiler warning for !CONFIG_KPROBES_ON_FTRACE | Date | Thu, 6 Aug 2020 01:20:46 +0800 |
| |
Fix compiler warning(as show below) for !CONFIG_KPROBES_ON_FTRACE.
kernel/kprobes.c: In function 'kill_kprobe': kernel/kprobes.c:1116:33: warning: statement with no effect [-Wunused-value] 1116 | #define disarm_kprobe_ftrace(p) (-ENODEV) | ^ kernel/kprobes.c:2154:3: note: in expansion of macro 'disarm_kprobe_ftrace' 2154 | disarm_kprobe_ftrace(p);
Link: https://lore.kernel.org/r/20200805142136.0331f7ea@canb.auug.org.au
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Fixes: 0cb2f1372baa ("kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler") Signed-off-by: Muchun Song <songmuchun@bytedance.com> --- kernel/kprobes.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 503add629599..d36e2b017588 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -1114,9 +1114,20 @@ static int disarm_kprobe_ftrace(struct kprobe *p) ipmodify ? &kprobe_ipmodify_enabled : &kprobe_ftrace_enabled); } #else /* !CONFIG_KPROBES_ON_FTRACE */ -#define prepare_kprobe(p) arch_prepare_kprobe(p) -#define arm_kprobe_ftrace(p) (-ENODEV) -#define disarm_kprobe_ftrace(p) (-ENODEV) +static inline int prepare_kprobe(struct kprobe *p) +{ + return arch_prepare_kprobe(p); +} + +static inline int arm_kprobe_ftrace(struct kprobe *p) +{ + return -ENODEV; +} + +static inline int disarm_kprobe_ftrace(struct kprobe *p) +{ + return -ENODEV; +} #endif /* Arm a kprobe with text_mutex */ -- 2.11.0
| |