lkml.org 
[lkml]   [2010]   [Feb]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch 21/32] [PATCH] bug: use relative pointers in bug table entries
From: Heiko Carstens <heiko.carstens@de.ibm.com>

Reduces the size of the bug table entries by 50% on 64bit kernels.
Saves around 30kb on a defconfig kernel.
s390 version of b93a531e "allow bug table entries to use relative
pointers (and use it on x86-64)".

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

arch/s390/Kconfig | 3 +++
arch/s390/include/asm/bug.h | 10 ++--------
2 files changed, 5 insertions(+), 8 deletions(-)

Index: quilt-2.6/arch/s390/include/asm/bug.h
===================================================================
--- quilt-2.6.orig/arch/s390/include/asm/bug.h 2010-02-24 09:28:13.000000000 +0100
+++ quilt-2.6/arch/s390/include/asm/bug.h 2010-02-24 09:44:27.000000000 +0100
@@ -5,12 +5,6 @@

#ifdef CONFIG_BUG

-#ifdef CONFIG_64BIT
-#define S390_LONG ".quad"
-#else
-#define S390_LONG ".long"
-#endif
-
#ifdef CONFIG_DEBUG_BUGVERBOSE

#define __EMIT_BUG(x) do { \
@@ -21,7 +15,7 @@
"2: .asciz \""__FILE__"\"\n" \
".previous\n" \
".section __bug_table,\"a\"\n" \
- "3:\t" S390_LONG "\t1b,2b\n" \
+ "3: .long 1b-3b,2b-3b\n" \
" .short %0,%1\n" \
" .org 3b+%2\n" \
".previous\n" \
@@ -37,7 +31,7 @@
"0: j 0b+2\n" \
"1:\n" \
".section __bug_table,\"a\"\n" \
- "2:\t" S390_LONG "\t1b\n" \
+ "2: .long 1b-2b\n" \
" .short %0\n" \
" .org 2b+%1\n" \
".previous\n" \
Index: quilt-2.6/arch/s390/Kconfig
===================================================================
--- quilt-2.6.orig/arch/s390/Kconfig 2010-02-24 09:28:13.000000000 +0100
+++ quilt-2.6/arch/s390/Kconfig 2010-02-24 09:44:27.000000000 +0100
@@ -54,6 +54,9 @@
depends on BUG
default y

+config GENERIC_BUG_RELATIVE_POINTERS
+ def_bool y
+
config NO_IOMEM
def_bool y



\
 
 \ /
  Last update: 2010-02-24 09:49    [W:0.089 / U:3.480 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site