[PATCH] ARC: Change ld.as instruction to regular ld.

From: Liav Rehana
Date: Tue Aug 16 2016 - 17:27:35 EST


From: Liav Rehana <liavr@xxxxxxxxxxxx>

The instruction ld.as takes as operands a base address and an offset,
and doesn't access the sum of these two, but the sum of the base
address and a shifted version of the offset.
This isn't what we want in that case, since it causes a bug during
the push and pop of r25, since his actual offset is given during
resume_user_mode_begin.
Thus, the use of ld solves this problem.

Signed-off-by: Liav Rehana <liavr@xxxxxxxxxxxx>
---
arch/arc/include/asm/entry.h | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h
index 337ab6d..9d8f85d 100644
--- a/arch/arc/include/asm/entry.h
+++ b/arch/arc/include/asm/entry.h
@@ -138,7 +138,7 @@

#ifdef CONFIG_ARC_CURR_IN_REG
; Retrieve orig r25 and save it with rest of callee_regs
- ld.as r12, [r12, PT_user_r25]
+ ld r12, [r12, PT_user_r25]
PUSH r12
#else
PUSH r25
@@ -194,7 +194,7 @@

; SP is back to start of pt_regs
#ifdef CONFIG_ARC_CURR_IN_REG
- st.as r12, [sp, PT_user_r25]
+ st r12, [sp, PT_user_r25]
#endif
.endm

--
1.7.1