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authorJosh Poimboeuf <jpoimboe@redhat.com>2016-09-15 04:07:42 +0200
committerIngo Molnar <mingo@kernel.org>2016-09-15 08:13:15 +0200
commitcb76c93982404273d746f3ccd5085b47689099a8 (patch)
tree95103a60e29ad190e4ee9ef3818f97825eab936f /arch/x86/events
parentx86/dumpstack: Simplify in_exception_stack() (diff)
downloadlinux-cb76c93982404273d746f3ccd5085b47689099a8.tar.xz
linux-cb76c93982404273d746f3ccd5085b47689099a8.zip
x86/dumpstack: Add get_stack_info() interface
valid_stack_ptr() is buggy: it assumes that all stacks are of size THREAD_SIZE, which is not true for exception stacks. So the walk_stack() callbacks will need to know the location of the beginning of the stack as well as the end. Another issue is that in general the various features of a stack (type, size, next stack pointer, description string) are scattered around in various places throughout the stack dump code. Encapsulate all that information in a single place with a new stack_info struct and a get_stack_info() interface. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Byungchul Park <byungchul.park@lge.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nilay Vaish <nilayvaish@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/8164dd0db96b7e6a279fa17ae5e6dc375eecb4a9.1473905218.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/events')
-rw-r--r--arch/x86/events/core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index c1319ac19ebb..477dc38b62b1 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2251,7 +2251,7 @@ void arch_perf_update_userpage(struct perf_event *event,
* callchain support
*/
-static int backtrace_stack(void *data, char *name)
+static int backtrace_stack(void *data, const char *name)
{
return 0;
}