On Mon, Apr 03, 2023 at 11:43:36AM +0200, Heiko Carstens wrote:
commit 89aba4c26fae4e459f755a18912845c348ee48f3 upstream.
Add missing earlyclobber annotation to size, to, and tmp2 operands of the __clear_user() inline assembly since they are modified or written to before the last usage of all input operands. This can lead to incorrect register allocation for the inline assembly.
Fixes: 6c2a9e6df604 ("[S390] Use alternative user-copy operations for new hardware.") Reported-by: Mark Rutland mark.rutland@arm.com Link: https://lore.kernel.org/all/20230321122514.1743889-3-mark.rutland@arm.com/ Cc: stable@vger.kernel.org Reviewed-by: Gerald Schaefer gerald.schaefer@linux.ibm.com Signed-off-by: Vasily Gorbik gor@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com
arch/s390/lib/uaccess.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/lib/uaccess.c b/arch/s390/lib/uaccess.c index 802903c50de1..b11ebcb3d33b 100644 --- a/arch/s390/lib/uaccess.c +++ b/arch/s390/lib/uaccess.c @@ -272,7 +272,7 @@ static inline unsigned long clear_user_mvcos(void __user *to, unsigned long size "4: slgr %0,%0\n" "5:\n" EX_TABLE(0b,2b) EX_TABLE(3b,5b)
: "+a" (size), "+a" (to), "+a" (tmp1), "=a" (tmp2)
: "+&a" (size), "+&a" (to), "+a" (tmp1), "=&a" (tmp2)}
2.37.2
All now queued up, thanks!
greg k-h