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| author | Adrian Bunk <bunk@stusta.de> | 2006-01-17 09:13:55 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-17 10:15:25 +0300 |
| commit | 96419b7c4d996d9f12ca9f7189f316ed2938074a (patch) | |
| tree | d9865a0cb932320ec4883739f50098e1c564dfa5 | |
| parent | 6aa4c0ef388201745adadfc7855b8a871f0e6122 (diff) | |
| download | linux-96419b7c4d996d9f12ca9f7189f316ed2938074a.tar.xz | |
[PATCH] fix arm26 THREAD_SIZE
arm26 currently has a 256 kB THREAD_SIZE (sic).
Looking at the comment in the code, this seems to be based on a
misunderstanding.
The comment says:
this needs attention (see kernel/fork.c which gets a nice div by zero if
this is lower than 8*32768
kernel/fork.c does:
max_threads = mempages / (8 * THREAD_SIZE / PAGE_SIZE)
Therefore, a division by 0 is impossible for all reasonable cases with
THREAD_SIZE >= PAGE_SIZE.
Since the minimum PAGE_SIZE Linux uses on the arm26 architecture is 16k,
PAGE_SIZE should be sufficient for THREAD_SIZE.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/asm-arm26/thread_info.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/asm-arm26/thread_info.h b/include/asm-arm26/thread_info.h index a65e58a0a767..9b367ebe515d 100644 --- a/include/asm-arm26/thread_info.h +++ b/include/asm-arm26/thread_info.h @@ -80,8 +80,7 @@ static inline struct thread_info *current_thread_info(void) return (struct thread_info *)(sp & ~0x1fff); } -/* FIXME - PAGE_SIZE < 32K */ -#define THREAD_SIZE (8*32768) // FIXME - this needs attention (see kernel/fork.c which gets a nice div by zero if this is lower than 8*32768 +#define THREAD_SIZE PAGE_SIZE #define task_pt_regs(task) ((struct pt_regs *)(task_stack_page(task) + THREAD_SIZE - 8) - 1) extern struct thread_info *alloc_thread_info(struct task_struct *task); |