From: Jens Axboe axboe@kernel.dk
commit 191f8453fc99a537ea78b727acea739782378b0d upstream.
We want to ensure that the mask related to calling do_work_pending() is within the first 16 bits. Move bits unrelated to that outside of that range, to avoid spuriously calling do_work_pending() when we don't need to.
Cc: stable@vger.kernel.org Fixes: 32d59773da38 ("arm: add support for TIF_NOTIFY_SIGNAL") Reported-and-tested-by: Hui Tang tanghui20@huawei.com Suggested-by: Russell King (Oracle) linux@armlinux.org.uk Link: https://lore.kernel.org/lkml/7ecb8f3c-2aeb-a905-0d4a-aa768b9649b5@huawei.com... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/include/asm/thread_info.h | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)
--- a/arch/arm/include/asm/thread_info.h +++ b/arch/arm/include/asm/thread_info.h @@ -128,15 +128,16 @@ extern int vfp_restore_user_hwstate(stru #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ #define TIF_UPROBE 3 /* breakpointed or singlestepping */ -#define TIF_SYSCALL_TRACE 4 /* syscall trace active */ -#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */ -#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */ -#define TIF_SECCOMP 7 /* seccomp syscall filtering active */ -#define TIF_NOTIFY_SIGNAL 8 /* signal notifications exist */ +#define TIF_NOTIFY_SIGNAL 4 /* signal notifications exist */
#define TIF_USING_IWMMXT 17 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ -#define TIF_RESTORE_SIGMASK 20 +#define TIF_RESTORE_SIGMASK 19 +#define TIF_SYSCALL_TRACE 20 /* syscall trace active */ +#define TIF_SYSCALL_AUDIT 21 /* syscall auditing active */ +#define TIF_SYSCALL_TRACEPOINT 22 /* syscall tracepoint instrumentation */ +#define TIF_SECCOMP 23 /* seccomp syscall filtering active */ +
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)