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switch do_brk() to get_unmapped_area()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2009-12-03 19:40:46 -05:00
parent 9206de95b1
commit 2c6a10161d
1 changed files with 2 additions and 8 deletions
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10
mm/mmap.c
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@ -1985,20 +1985,14 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
if (!len) if (!len)
return addr; return addr;
if ((addr + len) > TASK_SIZE || (addr + len) < addr)
return -EINVAL;
if (is_hugepage_only_range(mm, addr, len))
return -EINVAL;
error = security_file_mmap(NULL, 0, 0, 0, addr, 1); error = security_file_mmap(NULL, 0, 0, 0, addr, 1);
if (error) if (error)
return error; return error;
flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags; flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;
error = arch_mmap_check(addr, len, flags); error = get_unmapped_area(NULL, addr, len, 0, MAP_FIXED);
if (error) if (error & ~PAGE_MASK)
return error; return error;
/* /*