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| author | Nick Piggin <npiggin@suse.de> | 2006-03-22 00:08:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-22 07:53:57 -0800 |
| commit | 8dfcc9ba27e2ed257e5de9539f7f03e57c2c0e33 (patch) | |
| tree | aecaeb6a0b33c23f79dfcd2418e4a3881a29f2e2 /arch/arm/mm/consistent.c | |
| parent | 8e7a9aae91101916b86de07fafe3272ea8dc1f10 (diff) | |
| download | lwn-8dfcc9ba27e2ed257e5de9539f7f03e57c2c0e33.tar.gz lwn-8dfcc9ba27e2ed257e5de9539f7f03e57c2c0e33.zip | |
[PATCH] mm: split highorder pages
Have an explicit mm call to split higher order pages into individual pages.
Should help to avoid bugs and be more explicit about the code's intention.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/arm/mm/consistent.c')
| -rw-r--r-- | arch/arm/mm/consistent.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mm/consistent.c b/arch/arm/mm/consistent.c index c2ee18d2075e..8a1bfcd50087 100644 --- a/arch/arm/mm/consistent.c +++ b/arch/arm/mm/consistent.c @@ -223,6 +223,8 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, pte = consistent_pte[idx] + off; c->vm_pages = page; + split_page(page, order); + /* * Set the "dma handle" */ @@ -231,7 +233,6 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, do { BUG_ON(!pte_none(*pte)); - set_page_count(page, 1); /* * x86 does not mark the pages reserved... */ @@ -250,7 +251,6 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, * Free the otherwise unused pages. */ while (page < end) { - set_page_count(page, 1); __free_page(page); page++; } |