arm64: Bug fix in stack alignment exception

The value of ESR has been stored into x1, and should be directly pass to
do_sp_pc_abort function, "MOV x1, x25" is an extra operation and do_sp_pc_abort
will get the wrong value of ESR.

Signed-off-by: ChiaHao <andy.jhshiu@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org>

diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index bf017f4ffb4fb074283a1c8807aa40033b5bedf6..9ce04ba6bcb0f0c99ce28e999af0de00868a5765 100644 (file)
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -279,7 +279,6 @@ el1_sp_pc:
         */
        mrs     x0, far_el1
        enable_dbg
-       mov     x1, x25
        mov     x2, sp
        b       do_sp_pc_abort
 el1_undef: