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author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-06-12 10:26:25 +0200 |
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committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-06-12 10:27:30 +0200 |
commit | 7757591ab4a36314a258e181dbf0994415c288c2 (patch) | |
tree | 99b414c90dbc7889f7738a795122805f167a00af /arch/s390/include/asm/compat.h | |
parent | d90cbd469c9c7c1494fc2084af9319e6a557368b (diff) | |
download | kernel_samsung_smdk4412-7757591ab4a36314a258e181dbf0994415c288c2.zip kernel_samsung_smdk4412-7757591ab4a36314a258e181dbf0994415c288c2.tar.gz kernel_samsung_smdk4412-7757591ab4a36314a258e181dbf0994415c288c2.tar.bz2 |
[S390] implement is_compat_task
Implement is_compat_task and use it all over the place.
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/compat.h')
-rw-r--r-- | arch/s390/include/asm/compat.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h index de065b3..01a0802 100644 --- a/arch/s390/include/asm/compat.h +++ b/arch/s390/include/asm/compat.h @@ -5,6 +5,7 @@ */ #include <linux/types.h> #include <linux/sched.h> +#include <linux/thread_info.h> #define PSW32_MASK_PER 0x40000000UL #define PSW32_MASK_DAT 0x04000000UL @@ -163,12 +164,28 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr) return (u32)(unsigned long)uptr; } +#ifdef CONFIG_COMPAT + +static inline int is_compat_task(void) +{ + return test_thread_flag(TIF_31BIT); +} + +#else + +static inline int is_compat_task(void) +{ + return 0; +} + +#endif + static inline void __user *compat_alloc_user_space(long len) { unsigned long stack; stack = KSTK_ESP(current); - if (test_thread_flag(TIF_31BIT)) + if (is_compat_task()) stack &= 0x7fffffffUL; return (void __user *) (stack - len); } |