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Commit 6415b38b authored by Jiri Slaby's avatar Jiri Slaby Committed by Ingo Molnar
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x86/stacktrace: Enable HAVE_RELIABLE_STACKTRACE for the ORC unwinder 



In SUSE, we need a reliable stack unwinder for kernel live patching, but
we do not want to enable frame pointers for performance reasons. So
after the previous patches to make the ORC reliable, mark ORC as a
reliable stack unwinder on x86.

Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
Acked-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/lkml/20180518064713.26440-6-jslaby@suse.cz


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent d31a5802

arch/x86/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -180,7 +180,7 @@ config X86 
	select HAVE_PERF_USER_STACK_DUMP

	select HAVE_RCU_TABLE_FREE

	select HAVE_REGS_AND_STACK_ACCESS_API

	select HAVE_RELIABLE_STACKTRACE		if X86_64 && UNWINDER_FRAME_POINTER && STACK_VALIDATION

	select HAVE_RELIABLE_STACKTRACE		if X86_64 && (UNWINDER_FRAME_POINTER || UNWINDER_ORC) && STACK_VALIDATION

	select HAVE_STACKPROTECTOR		if CC_HAS_SANE_STACKPROTECTOR

	select HAVE_STACK_VALIDATION		if X86_64

	select HAVE_RSEQ