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[S390] bug: use relative pointers in bug table entries
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Fri, 26 Feb 2010 21:37:44 +0000 (22:37 +0100)
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>
Fri, 26 Feb 2010 21:37:31 +0000 (22:37 +0100)
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 patch | blob | blame | history
arch/s390/include/asm/bug.h patch | blob | blame | history

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index c80235206c017a89df2b365b5792845f3ecb850b..40334872f5eaa7a901e9f999bcfd4b8665ec3e2b 100644 (file)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -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
 
diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h
index b1066b9fb5f89f84cb80fbfa38218ccca2c0ea0a..9beeb9db9b23a7695adaf435755d1b1ae5bd37af 100644 (file)
--- a/arch/s390/include/asm/bug.h
+++ b/arch/s390/include/asm/bug.h
@@ -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"                           \