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| author | David Howells <dhowells@redhat.com> | 2010-03-23 13:35:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-24 16:31:20 -0700 |
| commit | 3fa30460ea502133a18a07b14452cd660906f16f (patch) | |
| tree | 0e7bd3404258fae1adc8813a7fc3c21c13ba3cba /mm/nommu.c | |
| parent | 28b8e8d4e2e3e27aa911b5aee59d5194a878f53e (diff) | |
| download | lwn-3fa30460ea502133a18a07b14452cd660906f16f.tar.gz lwn-3fa30460ea502133a18a07b14452cd660906f16f.zip | |
nommu: fix an incorrect comment in the do_mmap_shared_file()
Fix an incorrect comment in the do_mmap_shared_file(). If a mapping is
requested MAP_SHARED, then a private copy cannot be made and still provide
correct semantics.
Signed-off-by: David Howells <dhowells@redhat.com>
Reported-by: Dave Hudson <uclinux@blueteddy.net>
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 | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 605ace8982a8..e4b8f4d28a3f 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1040,10 +1040,9 @@ static int do_mmap_shared_file(struct vm_area_struct *vma) if (ret != -ENOSYS) return ret; - /* getting an ENOSYS error indicates that direct mmap isn't - * possible (as opposed to tried but failed) so we'll fall - * through to making a private copy of the data and mapping - * that if we can */ + /* getting -ENOSYS indicates that direct mmap isn't possible (as + * opposed to tried but failed) so we can only give a suitable error as + * it's not possible to make a private copy if MAP_SHARED was given */ return -ENODEV; } |