diff options
| author | Andrew Scull <ascull@google.com> | 2021-03-18 14:33:07 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-04-01 09:54:37 +0100 |
| commit | 3ad1a6cb0abc63d036fc866bd7c2c5983516dec5 (patch) | |
| tree | d874dccb304b839fbb4b663fac8737b4c47375db | |
| parent | 1e28eed17697bcf343c6743f0028cc3b5dd88bf0 (diff) | |
| download | lwn-3ad1a6cb0abc63d036fc866bd7c2c5983516dec5.tar.gz lwn-3ad1a6cb0abc63d036fc866bd7c2c5983516dec5.zip | |
bug: Remove redundant condition check in report_bug
report_bug() will return early if it cannot find a bug corresponding to
the provided address. The subsequent test for the bug will always be
true so remove it.
Fixes: 1b4cfe3c0a30d ("lib/bug.c: exclude non-BUG/WARN exceptions from report_bug()")
Signed-off-by: Andrew Scull <ascull@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210318143311.839894-2-ascull@google.com
| -rw-r--r-- | lib/bug.c | 33 |
1 files changed, 15 insertions, 18 deletions
diff --git a/lib/bug.c b/lib/bug.c index 8f9d537bfb2a..b92da1f6e21b 100644 --- a/lib/bug.c +++ b/lib/bug.c @@ -155,30 +155,27 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs) file = NULL; line = 0; - warning = 0; - if (bug) { #ifdef CONFIG_DEBUG_BUGVERBOSE #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS - file = bug->file; + file = bug->file; #else - file = (const char *)bug + bug->file_disp; + file = (const char *)bug + bug->file_disp; #endif - line = bug->line; + line = bug->line; #endif - warning = (bug->flags & BUGFLAG_WARNING) != 0; - once = (bug->flags & BUGFLAG_ONCE) != 0; - done = (bug->flags & BUGFLAG_DONE) != 0; - - if (warning && once) { - if (done) - return BUG_TRAP_TYPE_WARN; - - /* - * Since this is the only store, concurrency is not an issue. - */ - bug->flags |= BUGFLAG_DONE; - } + warning = (bug->flags & BUGFLAG_WARNING) != 0; + once = (bug->flags & BUGFLAG_ONCE) != 0; + done = (bug->flags & BUGFLAG_DONE) != 0; + + if (warning && once) { + if (done) + return BUG_TRAP_TYPE_WARN; + + /* + * Since this is the only store, concurrency is not an issue. + */ + bug->flags |= BUGFLAG_DONE; } /* |