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mlock: revert mainline handling of mlock error return 

This change is intended to make mlock() error returns correct.
make_page_present() is a lower level function used by more than mlock().
Subsequent patch[es] will add this error return fixup in an mlock specific
path.

Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lee Schermerhorn 2008-10-18 20:26:56 -07:00 committed by Linus Torvalds
parent e0f79b8f1f
commit c11d69d8c8
1 changed files with 2 additions and 12 deletions
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14
mm/memory.c
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@ -2819,19 +2819,9 @@ int make_pages_present(unsigned long addr, unsigned long end)
len = DIV_ROUND_UP(end, PAGE_SIZE) - addr/PAGE_SIZE;
ret = get_user_pages(current, current->mm, addr,
len, write, 0, NULL, NULL);
if (ret < 0) {
/*
SUS require strange return value to mlock
- invalid addr generate to ENOMEM.
- out of memory should generate EAGAIN.
*/
if (ret == -EFAULT)
ret = -ENOMEM;
else if (ret == -ENOMEM)
ret = -EAGAIN;
if (ret < 0)
return ret;
}
return ret == len ? 0 : -ENOMEM;
return ret == len ? 0 : -1;
}
#if !defined(__HAVE_ARCH_GATE_AREA)