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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2016-09-16 15:05:20 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-09-16 16:21:39 +0200 |
| commit | 81539169f283329fd8bc58457cc15754f683ba69 (patch) | |
| tree | 2172bf58d81411a56750134aaa08109a0b910c82 /arch/x86/kernel/dumpstack_64.c | |
| parent | fork: Optimize task creation by caching two thread stacks per CPU if CONFIG_V... (diff) | |
| download | linux-81539169f283329fd8bc58457cc15754f683ba69.tar.xz linux-81539169f283329fd8bc58457cc15754f683ba69.zip | |
x86/dumpstack: Remove NULL task pointer convention
show_stack_log_lvl() and friends allow a NULL pointer for the
task_struct to indicate the current task. This creates confusion and
can cause sneaky bugs.
Instead require the caller to pass 'current' directly.
This only changes the internal workings of the dumpstack code. The
dump_trace() and show_stack() interfaces still allow a NULL task
pointer. Those interfaces should also probably be fixed as well.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/dumpstack_64.c')
| -rw-r--r-- | arch/x86/kernel/dumpstack_64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c index 16c0d5f89b5e..008a29837cab 100644 --- a/arch/x86/kernel/dumpstack_64.c +++ b/arch/x86/kernel/dumpstack_64.c @@ -278,7 +278,7 @@ void show_regs(struct pt_regs *regs) u8 *ip; printk(KERN_DEFAULT "Stack:\n"); - show_stack_log_lvl(NULL, regs, NULL, 0, KERN_DEFAULT); + show_stack_log_lvl(current, regs, NULL, 0, KERN_DEFAULT); printk(KERN_DEFAULT "Code: "); |