[GIT PULL] Stack randomization fix

[Ingo Molnar]

Linus,

Please pull the latest core/urgent git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-urgent-2021-05-15

   # HEAD: 2515dd6ce8e545b0b2eece84920048ef9ed846c4 stack: Replace "o" output with "r" input constraint

Fix an assembly constraint that affected LLVM up to version 12.

 Thanks,

	Ingo

------------------>
Nick Desaulniers (1):
      stack: Replace "o" output with "r" input constraint


 include/linux/randomize_kstack.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/randomize_kstack.h b/include/linux/randomize_kstack.h
index fd80fab663a9..bebc911161b6 100644
--- a/include/linux/randomize_kstack.h
+++ b/include/linux/randomize_kstack.h
@@ -38,7 +38,7 @@ void *__builtin_alloca(size_t size);
 		u32 offset = raw_cpu_read(kstack_offset);		\
 		u8 *ptr = __builtin_alloca(KSTACK_OFFSET_MAX(offset));	\
 		/* Keep allocation even after "ptr" loses scope. */	\
-		asm volatile("" : "=o"(*ptr) :: "memory");		\
+		asm volatile("" :: "r"(ptr) : "memory");		\
 	}								\
 } while (0)