[S390] bug: use relative pointers in bug table entries (52499f40) · Commits · 戴 / test

Reduces the size of the bug table entries by 50% on 64bit kernels. Saves around 30kb on a defconfig kernel. s390 version of "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 −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" \

Admin message