diff options
author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-09-05 13:26:11 +0200 |
---|---|---|
committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-09-26 15:45:10 +0200 |
commit | eb608fb366de123a97227437e5306f731f4a63c5 (patch) | |
tree | 6466e9b0bcd942457e0aa251af48816e3e925d90 /arch/s390/include/asm/uaccess.h | |
parent | s390/scm: reorder scm_remove (diff) | |
download | linux-eb608fb366de123a97227437e5306f731f4a63c5.tar.xz linux-eb608fb366de123a97227437e5306f731f4a63c5.zip |
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.h | 15 |
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 *); |