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| author | Michel Lespinasse <walken@google.com> | 2013-02-23 01:32:47 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-24 02:50:11 +0100 |
| commit | 41badc15cbad0350de34408c1b0c690f9df76d4b (patch) | |
| tree | 2545134398b99b37259bf6412a0bb56442f120fa /mm/nommu.c | |
| parent | mm: introduce VM_POPULATE flag to better deal with racy userspace programs (diff) | |
| download | linux-41badc15cbad0350de34408c1b0c690f9df76d4b.tar.xz linux-41badc15cbad0350de34408c1b0c690f9df76d4b.zip | |
mm: make do_mmap_pgoff return populate as a size in bytes, not as a bool
do_mmap_pgoff() rounds up the desired size to the next PAGE_SIZE
multiple, however there was no equivalent code in mm_populate(), which
caused issues.
This could be fixed by introduced the same rounding in mm_populate(),
however I think it's preferable to make do_mmap_pgoff() return populate
as a size rather than as a boolean, so we don't have to duplicate the
size rounding logic in mm_populate().
Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Tested-by: Andy Lutomirski <luto@amacapital.net>
Cc: Greg Ungerer <gregungerer@westnet.com.au>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 7296a5a280e7..18c1b932e2c4 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1251,7 +1251,7 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long prot, unsigned long flags, unsigned long pgoff, - bool *populate) + unsigned long *populate) { struct vm_area_struct *vma; struct vm_region *region; @@ -1261,7 +1261,7 @@ unsigned long do_mmap_pgoff(struct file *file, kenter(",%lx,%lx,%lx,%lx,%lx", addr, len, prot, flags, pgoff); - *populate = false; + *populate = 0; /* decide whether we should attempt the mapping, and if so what sort of * mapping */ |