diff options
| author | Sonic Zhang <sonic.zhang@analog.com> | 2009-01-07 23:14:38 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2009-01-07 23:14:38 +0800 |
| commit | cc92b870a779500f444419f27bf73c6c7660ff9c (patch) | |
| tree | b82430fe2c0aaa72ea4ebdbc21fb1f2ce8cca7c2 | |
| parent | 459249aa2d9ae02f49479a2096e5372ccc29c9be (diff) | |
Blackfin arch: disable pthread stack check for SMP at runtime
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
| -rw-r--r-- | arch/blackfin/include/asm/l1layout.h | 2 | ||||
| -rw-r--r-- | arch/blackfin/include/asm/processor.h | 11 | ||||
| -rw-r--r-- | arch/blackfin/include/asm/system.h | 7 | ||||
| -rw-r--r-- | arch/blackfin/include/asm/thread_info.h | 2 |
4 files changed, 22 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/l1layout.h b/arch/blackfin/include/asm/l1layout.h index 06bb37f6c78..79dbefaa5be 100644 --- a/arch/blackfin/include/asm/l1layout.h +++ b/arch/blackfin/include/asm/l1layout.h @@ -8,6 +8,7 @@ #include <asm/blackfin.h> +#ifndef CONFIG_SMP #ifndef __ASSEMBLY__ /* Data that is "mapped" into the process VM at the start of the L1 scratch @@ -28,5 +29,6 @@ struct l1_scratch_task_info get_l1_scratch_start()) #endif +#endif #endif diff --git a/arch/blackfin/include/asm/processor.h b/arch/blackfin/include/asm/processor.h index 83d57a85b14..0eece23b41c 100644 --- a/arch/blackfin/include/asm/processor.h +++ b/arch/blackfin/include/asm/processor.h @@ -65,6 +65,7 @@ struct thread_struct { * pass the data segment into user programs if it exists, * it can't hurt anything as far as I can tell */ +#ifndef CONFIG_SMP #define start_thread(_regs, _pc, _usp) \ do { \ set_fs(USER_DS); \ @@ -78,6 +79,16 @@ do { \ sizeof(*L1_SCRATCH_TASK_INFO)); \ wrusp(_usp); \ } while(0) +#else +#define start_thread(_regs, _pc, _usp) \ +do { \ + set_fs(USER_DS); \ + (_regs)->pc = (_pc); \ + if (current->mm) \ + (_regs)->p5 = current->mm->start_data; \ + wrusp(_usp); \ +} while (0) +#endif /* Forward declaration, a strange C thing */ struct task_struct; diff --git a/arch/blackfin/include/asm/system.h b/arch/blackfin/include/asm/system.h index aa7d87b62b2..812e6e6e2ce 100644 --- a/arch/blackfin/include/asm/system.h +++ b/arch/blackfin/include/asm/system.h @@ -197,6 +197,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, asmlinkage struct task_struct *resume(struct task_struct *prev, struct task_struct *next); +#ifndef CONFIG_SMP #define switch_to(prev,next,last) \ do { \ memcpy (&task_thread_info(prev)->l1_task_info, L1_SCRATCH_TASK_INFO, \ @@ -205,5 +206,11 @@ do { \ sizeof *L1_SCRATCH_TASK_INFO); \ (last) = resume (prev, next); \ } while (0) +#else +#define switch_to(prev, next, last) \ +do { \ + (last) = resume(prev, next); \ +} while (0) +#endif #endif /* _BLACKFIN_SYSTEM_H */ diff --git a/arch/blackfin/include/asm/thread_info.h b/arch/blackfin/include/asm/thread_info.h index 7eaf2e2606d..e721ce55956 100644 --- a/arch/blackfin/include/asm/thread_info.h +++ b/arch/blackfin/include/asm/thread_info.h @@ -63,7 +63,9 @@ struct thread_info { int preempt_count; /* 0 => preemptable, <0 => BUG */ mm_segment_t addr_limit; /* address limit */ struct restart_block restart_block; +#ifndef CONFIG_SMP struct l1_scratch_task_info l1_task_info; +#endif }; /* |