ARM: 5991/1: Fix regression in restore_user_regs macro

ARMv5T and earlier require that a ldm {}^ instruction is not followed
by an instruction that accesses banked registers. This patch restores
the nop that was lost in commit b86040a59feb255a8193173caa4d5199464433d5.

Signed-off-by: Anders Grafström <grfstrm@users.sourceforge.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 7e9ed1e..d93f976 100644 (file)
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -102,6 +102,8 @@
        .else
        ldmdb   sp, {r0 - lr}^                  @ get calling r0 - lr
        .endif
+       mov     r0, r0                          @ ARMv5T and earlier require a nop
+                                               @ after ldm {}^
        add     sp, sp, #S_FRAME_SIZE - S_PC
        movs    pc, lr                          @ return & move spsr_svc into cpsr
        .endm