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| author |   Dan Williams <dan.j.williams@intel.com> | 2009-09-08 17:55:21 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-09-08 17:55:21 -0700 |
| commit | bbb20089a3275a19e475dbc21320c3742e3ca423 (patch) | |
| tree | 216fdc1cbef450ca688135c5b8969169482d9a48 /arch/s390/include/asm/compat.h | |
| parent | Merge branch 'iop-raid6' into async-tx-next (diff) | |
| parent | dmaengine: Move all map_sg/unmap_sg for slave channel to its client (diff) | |
| download | wireguard-linux-bbb20089a3275a19e475dbc21320c3742e3ca423.tar.xz wireguard-linux-bbb20089a3275a19e475dbc21320c3742e3ca423.zip | |
Merge branch 'dmaengine' into async-tx-next
Conflicts:
crypto/async_tx/async_xor.c
drivers/dma/ioat/dma_v2.h
drivers/dma/ioat/pci.c
drivers/md/raid5.c
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 de065b32381a..01a08020bc0e 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); } |