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[S390] bug: use relative pointers in bug table entries 

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>
This commit is contained in:
Heiko Carstens 2010-02-26 22:37:44 +01:00 committed by Martin Schwidefsky
parent cbb870c822
commit 52499f4026
2 changed files with 5 additions and 8 deletions
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3
arch/s390/Kconfig
View File

@ -54,6 +54,9 @@ config GENERIC_BUG
depends on BUG
default y
config GENERIC_BUG_RELATIVE_POINTERS
def_bool y
config NO_IOMEM
def_bool y

10
arch/s390/include/asm/bug.h
View File

@ -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" \