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[SPARC64]: Increase top of 32-bit process stack.

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Put it one page below the top of the 32-bit address space.
This gives us ~16MB more address space to work with.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-03-17 17:33:56 -08:00
parent a91690ddd0
commit d61e16df94
5 changed files with 21 additions and 15 deletions
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9
arch/sparc64/kernel/sys_sparc32.c
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@ -62,6 +62,7 @@
#include <asm/fpumacro.h>
#include <asm/semaphore.h>
#include <asm/mmu_context.h>
#include <asm/a.out.h>
asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
{
@ -1039,15 +1040,15 @@ asmlinkage unsigned long sys32_mremap(unsigned long addr,
unsigned long ret = -EINVAL;
unsigned long new_addr = __new_addr;
if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
goto out;
if (addr > 0xf0000000UL - old_len)
if (addr > STACK_TOP32 - old_len)
goto out;
down_write(&current->mm->mmap_sem);
if (flags & MREMAP_FIXED) {
if (new_addr > 0xf0000000UL - new_len)
if (new_addr > STACK_TOP32 - new_len)
goto out_sem;
} else if (addr > 0xf0000000UL - new_len) {
} else if (addr > STACK_TOP32 - new_len) {
unsigned long map_flags = 0;
struct file *file = NULL;