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Commit 52499f40 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[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: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent cbb870c8

arch/s390/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -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

arch/s390/include/asm/bug.h

+2 −8
Original line number Diff line number Diff line
@@ -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"				\