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| author | Steven Rostedt <rostedt@goodmis.org> | 2008-10-14 18:08:48 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-20 18:27:00 +0200 |
| commit | c513867561eeb07d24a0bdda1a18a8f91921a301 (patch) | |
| tree | 77a772903b6960306607ccd9e8dd1b7d665c71a9 /arch/x86/kernel/ftrace.c | |
| parent | 3e10e879a8c334a5927d800a3663a24d562cfa31 (diff) | |
| download | blackbird-op-linux-c513867561eeb07d24a0bdda1a18a8f91921a301.tar.gz blackbird-op-linux-c513867561eeb07d24a0bdda1a18a8f91921a301.zip | |
ftrace: do not enclose logic in WARN_ON
In ftrace, logic is defined in the WARN_ON_ONCE, which can become a
nop with some configs. This patch fixes it.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/ftrace.c')
| -rw-r--r-- | arch/x86/kernel/ftrace.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index d073d981a730..8821ceabf51d 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -62,6 +62,7 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code, unsigned char *new_code) { unsigned char replaced[MCOUNT_INSN_SIZE]; + int ret; /* * Note: Due to modules and __init, code can @@ -77,8 +78,9 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code, if (memcmp(replaced, old_code, MCOUNT_INSN_SIZE) != 0) return 2; - WARN_ON_ONCE(__copy_to_user_inatomic((char __user *)ip, new_code, - MCOUNT_INSN_SIZE)); + ret = __copy_to_user_inatomic((char __user *)ip, new_code, + MCOUNT_INSN_SIZE); + WARN_ON_ONCE(ret); sync_core(); |
