From f3d48f0373c14a6203202f7b1dfc7b0d8aaf6ed2 Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Mon, 21 Nov 2005 21:32:22 -0800 Subject: [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- sound/core/memalloc.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'sound/core/memalloc.c') diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c index 129abab5ce98..e4b8959dd4bb 100644 --- a/sound/core/memalloc.c +++ b/sound/core/memalloc.c @@ -197,6 +197,7 @@ void *snd_malloc_pages(size_t size, gfp_t gfp_flags) snd_assert(size > 0, return NULL); snd_assert(gfp_flags != 0, return NULL); + gfp_flags |= __GFP_COMP; /* compound page lets parts be mapped */ pg = get_order(size); if ((res = (void *) __get_free_pages(gfp_flags, pg)) != NULL) { mark_pages(virt_to_page(res), pg); @@ -241,6 +242,7 @@ static void *snd_malloc_dev_pages(struct device *dev, size_t size, dma_addr_t *d snd_assert(dma != NULL, return NULL); pg = get_order(size); gfp_flags = GFP_KERNEL + | __GFP_COMP /* compound page lets parts be mapped */ | __GFP_NORETRY /* don't trigger OOM-killer */ | __GFP_NOWARN; /* no stack trace print - this call is non-critical */ res = dma_alloc_coherent(dev, PAGE_SIZE << pg, dma, gfp_flags); -- cgit