From: Adrian Bunk Date: Tue, 17 Jan 2006 06:13:55 +0000 (-0800) Subject: [PATCH] fix arm26 THREAD_SIZE X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=96419b7c4d996d9f12ca9f7189f316ed2938074a;p=linux-beck.git [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 Signed-off-by: Ian Molton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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);