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(parent: 913f2d7) | patch
Allow arbitrary read-only shared pfn-remapping too
authorLinus Torvalds <torvalds@g5.osdl.org>
Mon, 12 Dec 2005 04:38:17 +0000 (20:38 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Mon, 12 Dec 2005 04:38:17 +0000 (20:38 -0800)
commit67121172f9753f38689651b613a4850e0e75876f
treecfb6ea8365c44a43ee254385c7d246f0418cedd0tree | snapshot (tar.gz zip)
parent913f2d792ff584bf9ebf5968472b3e4ffe0fd9c8commit | diff
Allow arbitrary read-only shared pfn-remapping too

The VM layer (for historical reasons) turns a read-only shared mmap into
a private-like mapping with the VM_MAYWRITE bit clear.  Thus checking
just VM_SHARED isn't actually sufficient.

So use a trivial helper function for the cases where we wanted to inquire
if a mapping was COW-like or not.

Moo!

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
mm/memory.c diff | blob | blame | history