mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 23:12:32 +00:00
e2cd04bfb3
With gcc-4.8 I get a compile error with kernel 3.3.
This patch fixes this problem by backporting a patch from a more recent kernel version.
CC arch/mips/mm/page.o
arch/mips/mm/page.c:89:6: error: 'clear_page' alias in between function and variable is not supported
void clear_page(void *page) __attribute__((alias("clear_page_array")));
^
arch/mips/mm/page.c:84:12: error: 'clear_page_array' aliased declaration [-Werror]
static u32 clear_page_array[0x120 / 4];
^
arch/mips/mm/page.c:108:6: error: 'copy_page' alias in between function and variable is not supported
void copy_page(void *to, void *from) __attribute__((alias("copy_page_array")));
^
arch/mips/mm/page.c:102:12: error: 'copy_page_array' aliased declaration [-Werror]
static u32 copy_page_array[0x540 / 4];
^
arch/mips/mm/page.c:108:6: error: 'copy_page' alias in between function and variable is not supported
void copy_page(void *to, void *from) __attribute__((alias("copy_page_array")));
^
arch/mips/mm/page.c:102:12: error: 'copy_page_array' aliased declaration [-Werror]
static u32 copy_page_array[0x540 / 4];
^
arch/mips/mm/page.c:89:6: error: 'clear_page' alias in between function and variable is not supported
void clear_page(void *page) __attribute__((alias("clear_page_array")));
^
arch/mips/mm/page.c:84:12: error: 'clear_page_array' aliased declaration [-Werror]
static u32 clear_page_array[0x120 / 4];
^
cc1: all warnings being treated as errors
make[7]: *** [arch/mips/mm/page.o] Error 1
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 40619
79 lines
2.2 KiB
Diff
79 lines
2.2 KiB
Diff
From 418df63adac56841ef6b0f1fcf435bc64d4ed177 Mon Sep 17 00:00:00 2001
|
|
From: Nicolas Pitre <nicolas.pitre@linaro.org>
|
|
Date: Tue, 12 Mar 2013 13:00:42 +0100
|
|
Subject: [PATCH] ARM: 7670/1: fix the memset fix
|
|
|
|
Commit 455bd4c430b0 ("ARM: 7668/1: fix memset-related crashes caused by
|
|
recent GCC (4.7.2) optimizations") attempted to fix a compliance issue
|
|
with the memset return value. However the memset itself became broken
|
|
by that patch for misaligned pointers.
|
|
|
|
This fixes the above by branching over the entry code from the
|
|
misaligned fixup code to avoid reloading the original pointer.
|
|
|
|
Also, because the function entry alignment is wrong in the Thumb mode
|
|
compilation, that fixup code is moved to the end.
|
|
|
|
While at it, the entry instructions are slightly reworked to help dual
|
|
issue pipelines.
|
|
|
|
Signed-off-by: Nicolas Pitre <nico@linaro.org>
|
|
Tested-by: Alexander Holler <holler@ahsoftware.de>
|
|
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
---
|
|
arch/arm/lib/memset.S | 33 +++++++++++++--------------------
|
|
1 file changed, 13 insertions(+), 20 deletions(-)
|
|
|
|
--- a/arch/arm/lib/memset.S
|
|
+++ b/arch/arm/lib/memset.S
|
|
@@ -14,31 +14,15 @@
|
|
|
|
.text
|
|
.align 5
|
|
- .word 0
|
|
-
|
|
-1: subs r2, r2, #4 @ 1 do we have enough
|
|
- blt 5f @ 1 bytes to align with?
|
|
- cmp r3, #2 @ 1
|
|
- strltb r1, [ip], #1 @ 1
|
|
- strleb r1, [ip], #1 @ 1
|
|
- strb r1, [ip], #1 @ 1
|
|
- add r2, r2, r3 @ 1 (r2 = r2 - (4 - r3))
|
|
-/*
|
|
- * The pointer is now aligned and the length is adjusted. Try doing the
|
|
- * memset again.
|
|
- */
|
|
|
|
ENTRY(memset)
|
|
-/*
|
|
- * Preserve the contents of r0 for the return value.
|
|
- */
|
|
- mov ip, r0
|
|
- ands r3, ip, #3 @ 1 unaligned?
|
|
- bne 1b @ 1
|
|
+ ands r3, r0, #3 @ 1 unaligned?
|
|
+ mov ip, r0 @ preserve r0 as return value
|
|
+ bne 6f @ 1
|
|
/*
|
|
* we know that the pointer in ip is aligned to a word boundary.
|
|
*/
|
|
- orr r1, r1, r1, lsl #8
|
|
+1: orr r1, r1, r1, lsl #8
|
|
orr r1, r1, r1, lsl #16
|
|
mov r3, r1
|
|
cmp r2, #16
|
|
@@ -127,4 +111,13 @@ ENTRY(memset)
|
|
tst r2, #1
|
|
strneb r1, [ip], #1
|
|
mov pc, lr
|
|
+
|
|
+6: subs r2, r2, #4 @ 1 do we have enough
|
|
+ blt 5b @ 1 bytes to align with?
|
|
+ cmp r3, #2 @ 1
|
|
+ strltb r1, [ip], #1 @ 1
|
|
+ strleb r1, [ip], #1 @ 1
|
|
+ strb r1, [ip], #1 @ 1
|
|
+ add r2, r2, r3 @ 1 (r2 = r2 - (4 - r3))
|
|
+ b 1b
|
|
ENDPROC(memset)
|