diff options
| author | David Howells <dhowells@redhat.com> | 2010-10-27 20:29:01 +0400 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2010-10-27 20:29:01 +0400 |
| commit | 7c7fcf762e405eb040ee10d22d656a791f616122 (patch) | |
| tree | 2ec4f320fe2d348ffbdab6aebc9a36bcbf13da34 /arch/mn10300/include/asm/thread_info.h | |
| parent | a5e03ca2fd57a5823b759981bff8d19b46ddad4d (diff) | |
| download | linux-7c7fcf762e405eb040ee10d22d656a791f616122.tar.xz | |
MN10300: Save frame pointer in thread_info struct rather than global var
Save the current exception frame pointer in the thread_info struct rather than
in a global variable as the latter makes SMP tricky, especially when preemption
is also enabled.
This also replaces __frame with current_frame() and rearranges header file
inclusions to make it all compile.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Diffstat (limited to 'arch/mn10300/include/asm/thread_info.h')
| -rw-r--r-- | arch/mn10300/include/asm/thread_info.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/mn10300/include/asm/thread_info.h b/arch/mn10300/include/asm/thread_info.h index 2001cb657a95..aa07a4a5d794 100644 --- a/arch/mn10300/include/asm/thread_info.h +++ b/arch/mn10300/include/asm/thread_info.h @@ -16,10 +16,6 @@ #include <asm/page.h> -#ifndef __ASSEMBLY__ -#include <asm/processor.h> -#endif - #define PREEMPT_ACTIVE 0x10000000 #ifdef CONFIG_4KSTACKS @@ -38,10 +34,14 @@ * must also be changed */ #ifndef __ASSEMBLY__ +typedef struct { + unsigned long seg; +} mm_segment_t; struct thread_info { struct task_struct *task; /* main task structure */ struct exec_domain *exec_domain; /* execution domain */ + struct pt_regs *frame; /* current exception frame */ unsigned long flags; /* low level flags */ __u32 cpu; /* current CPU */ __s32 preempt_count; /* 0 => preemptable, <0 => BUG */ @@ -55,6 +55,10 @@ struct thread_info { __u8 supervisor_stack[0]; }; +#define thread_info_to_uregs(ti) \ + ((struct pt_regs *) \ + ((unsigned long)ti + THREAD_SIZE - sizeof(struct pt_regs))) + #else /* !__ASSEMBLY__ */ #ifndef __ASM_OFFSETS_H__ @@ -102,6 +106,12 @@ struct thread_info *current_thread_info(void) return ti; } +static inline __attribute__((const)) +struct pt_regs *current_frame(void) +{ + return current_thread_info()->frame; +} + /* how to get the current stack pointer from C */ static inline unsigned long current_stack_pointer(void) { |