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authorHeiko Carstens <heiko.carstens@de.ibm.com>2012-09-05 15:26:11 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-09-26 17:45:10 +0400
commiteb608fb366de123a97227437e5306f731f4a63c5 (patch)
tree6466e9b0bcd942457e0aa251af48816e3e925d90 /arch/s390/include/asm/uaccess.h
parent24996edce547fd981c089db9a12717fd76a51160 (diff)
downloadlinux-eb608fb366de123a97227437e5306f731f4a63c5.tar.xz
s390/exceptions: switch to relative exception table entries
This is the s390 port of 70627654 "x86, extable: Switch to relative exception table entries". Reduces the size of our exception tables by 50% on 64 bit builds. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/uaccess.h')
-rw-r--r--arch/s390/include/asm/uaccess.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index a8ab18b18b54..34268df959a3 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -76,9 +76,22 @@ static inline int __range_ok(unsigned long addr, unsigned long size)
struct exception_table_entry
{
- unsigned long insn, fixup;
+ int insn, fixup;
};
+static inline unsigned long extable_insn(const struct exception_table_entry *x)
+{
+ return (unsigned long)&x->insn + x->insn;
+}
+
+static inline unsigned long extable_fixup(const struct exception_table_entry *x)
+{
+ return (unsigned long)&x->fixup + x->fixup;
+}
+
+#define ARCH_HAS_SORT_EXTABLE
+#define ARCH_HAS_SEARCH_EXTABLE
+
struct uaccess_ops {
size_t (*copy_from_user)(size_t, const void __user *, void *);
size_t (*copy_from_user_small)(size_t, const void __user *, void *);