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MIPS: Cleanup arch_get_unmapped_area

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As noticed by Kevin Cernekee <cernekee@gmail.com> in
http://www.linux-mips.org/cgi-bin/extract-mesg.cgi?a=linux-mips&m=2011-05&i=BANLkTikq04wuK%3Dbz%2BLieavmm3oDtoYWKxg%40mail.gmail.com

Patchwork: https://patchwork.linux-mips.org/patch/2387/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2011-05-17 16:18:09 +01:00
parent e650ce0f08
commit 9c1e8a9138
1 changed files with 5 additions and 12 deletions
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17
arch/mips/kernel/syscall.c
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@ -79,20 +79,13 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
{
struct vm_area_struct * vmm;
int do_color_align;
unsigned long task_size;
#ifdef CONFIG_32BIT
task_size = TASK_SIZE;
#else /* Must be CONFIG_64BIT*/
task_size = test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE;
#endif
if (len > task_size)
if (len > TASK_SIZE)
return -ENOMEM;
if (flags & MAP_FIXED) {
/* Even MAP_FIXED mappings must reside within task_size. */
if (task_size - len < addr)
/* Even MAP_FIXED mappings must reside within TASK_SIZE. */
if (TASK_SIZE - len < addr)
return -EINVAL;
/*
@ -114,7 +107,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
else
addr = PAGE_ALIGN(addr);
vmm = find_vma(current->mm, addr);
if (task_size - len >= addr &&
if (TASK_SIZE - len >= addr &&
(!vmm || addr + len <= vmm->vm_start))
return addr;
}
@ -126,7 +119,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
/* At this point: (!vmm || addr < vmm->vm_end). */
if (task_size - len < addr)
if (TASK_SIZE - len < addr)
return -ENOMEM;
if (!vmm || addr + len <= vmm->vm_start)
return addr;