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authorSteven Rostedt <rostedt@goodmis.org>2014-03-07 10:52:42 -0500
committerIngo Molnar <mingo@kernel.org>2014-03-11 12:02:31 +0100
commit7743a536beda6225eef4a0758c5370f761fb0616 (patch)
tree6b430b8c29c6a1e1e6dac333ef26ac219f2029f4 /arch
parent8712a00514e50aafa7c9bf5cd3955fa60758e53b (diff)
downloadlinux-7743a536beda6225eef4a0758c5370f761fb0616.tar.gz
i386: Remove unneeded test of 'task' in dump_trace() (again)
Commit 028a690a1ebc8b "i386: Remove unneeded test of 'task' in dump_trace()" correctly removed the unneeded 'task != NULL' check because it would be set to current if it was NULL. Commit 2bc5f927d489 "i386: split out dumpstack code from traps_32.c" moved the code from traps_32.c to its own file dump_stack.c for preparation of the i386 / x86_64 merge. Commit 8a541665b906 "dumpstack: x86: various small unification steps" worked to make i386 and x86_64 dump_stack logic similar. But this actually reverted the correct change from 028a690a1ebc8b. Commit d0caf292505d "x86/dumpstack: Remove unneeded check in dump_trace()" removed the unneeded "task != NULL" check for x86_64 but left that same unneeded check for i386, that was added because x86_64 had it! This chain of events ironically had i386 add back the unneeded task != NULL check because x86_64 did it, and then the fix for x86_64 was fixed by Dan. And even more ironically, it was Dan's smatch bot that told me that a change to dump_stack_32 I made may be wrong if current can be NULL (it can't), as there was a check for it by assigning task to current, and then checking if task is NULL. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Alexander van Heukelum <heukelum@fastmail.fm> Cc: Jesper Juhl <jesper.juhl@gmail.com> Link: http://lkml.kernel.org/r/20140307105242.79a0befd@gandalf.local.home Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/dumpstack_32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
index f2a1770ca176..a21d49c071db 100644
--- a/arch/x86/kernel/dumpstack_32.c
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -30,7 +30,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
unsigned long dummy;
stack = &dummy;
- if (task && task != current)
+ if (task != current)
stack = (unsigned long *)task->thread.sp;
}