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x86, mm: rename TASK_SIZE64 => TASK_SIZE_MAX

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Impact: cleanup

Rename TASK_SIZE64 to TASK_SIZE_MAX, and provide the
define on 32-bit too. (mapped to TASK_SIZE)

This allows 32-bit code to make use of the (former-) TASK_SIZE64
symbol as well, in a clean way.

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
2009-02-20 23:32:28 +01:00
parent c3731c6866
commit d951734654
4 changed files with 9 additions and 8 deletions
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9
arch/x86/include/asm/processor.h
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@ -861,6 +861,7 @@ static inline void spin_lock_prefetch(const void *x)
* User space process size: 3GB (default).
*/
#define TASK_SIZE PAGE_OFFSET
#define TASK_SIZE_MAX TASK_SIZE
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX STACK_TOP
@ -920,7 +921,7 @@ extern unsigned long thread_saved_pc(struct task_struct *tsk);
/*
* User space process size. 47bits minus one guard page.
*/
#define TASK_SIZE64 ((1UL << 47) - PAGE_SIZE)
#define TASK_SIZE_MAX ((1UL << 47) - PAGE_SIZE)
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's.
@ -929,12 +930,12 @@ extern unsigned long thread_saved_pc(struct task_struct *tsk);
0xc0000000 : 0xFFFFe000)
#define TASK_SIZE (test_thread_flag(TIF_IA32) ? \
IA32_PAGE_OFFSET : TASK_SIZE64)
IA32_PAGE_OFFSET : TASK_SIZE_MAX)
#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \
IA32_PAGE_OFFSET : TASK_SIZE64)
IA32_PAGE_OFFSET : TASK_SIZE_MAX)
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX TASK_SIZE64
#define STACK_TOP_MAX TASK_SIZE_MAX
#define INIT_THREAD { \
.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \