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authorDavid Howells <dhowells@redhat.com>2010-03-23 13:35:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-24 16:31:20 -0700
commit3fa30460ea502133a18a07b14452cd660906f16f (patch)
tree0e7bd3404258fae1adc8813a7fc3c21c13ba3cba /mm
parent28b8e8d4e2e3e27aa911b5aee59d5194a878f53e (diff)
downloadconfigs-3fa30460ea502133a18a07b14452cd660906f16f.tar.gz
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')
-rw-r--r--mm/nommu.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/mm/nommu.c b/mm/nommu.c
index 605ace8982a..e4b8f4d28a3 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;
}