[PATCH] unpaged: fix sound Bad page states
authorHugh Dickins <hugh@veritas.com>
Tue, 22 Nov 2005 05:32:22 +0000 (21:32 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Tue, 22 Nov 2005 17:13:43 +0000 (09:13 -0800)
commitf3d48f0373c14a6203202f7b1dfc7b0d8aaf6ed2
treee09198efae7c68b9b4799b0f85d67951cc33bb54
parent0b0db14c536debd92328819fe6c51a49717e8440
[PATCH] unpaged: fix sound Bad page states

Earlier I unifdefed PageCompound, so that snd_pcm_mmap_control_nopage and
others can give out a 0-order component of a higher-order page, which won't
be mistakenly freed when zap_pte_range unmaps it.  But many Bad page states
reported a PG_reserved was freed after all: I had missed that we need to
say __GFP_COMP to get compound page behaviour.

Some of these higher-order pages are allocated by snd_malloc_pages, some by
snd_malloc_dev_pages; or if SBUS, by sbus_alloc_consistent - but that has
no gfp arg, so add __GFP_COMP into its sparc32/64 implementations.

I'm still rather puzzled that DRM seems not to need a similar change.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/sparc/kernel/ioport.c
arch/sparc64/kernel/sbus.c
sound/core/memalloc.c