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| author |   akpm@osdl.org <akpm@osdl.org> | 2005-04-16 15:23:57 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:23:57 -0700 |
| commit | 7a228aaa879c119c9fb9b9d7e062ac13cb1a9079 (patch) | |
| tree | 7a79aef406aa44dcbe887e69656aef61ed98dd9a | |
| parent | [PATCH] arm: fix help text for ixdp465 (diff) | |
| download | linux-dev-7a228aaa879c119c9fb9b9d7e062ac13cb1a9079.tar.xz linux-dev-7a228aaa879c119c9fb9b9d7e062ac13cb1a9079.zip | |
[PATCH] arm: add comment about dma_supported()
)
From: Russell King <rmk+lkml@arm.linux.org.uk>
The ARM dma_supported() is rather basic, and I don't think it takes into
account everything that it should do (eg, whether the mask agrees with what
we'd return for GFP_DMA allocations). Note this.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
| -rw-r--r-- | include/asm-arm/dma-mapping.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-arm/dma-mapping.h b/include/asm-arm/dma-mapping.h index 925d016dd4b5..d62ade4e4cbb 100644 --- a/include/asm-arm/dma-mapping.h +++ b/include/asm-arm/dma-mapping.h @@ -21,6 +21,9 @@ extern void consistent_sync(void *kaddr, size_t size, int rw); * properly. For example, if your device can only drive the low 24-bits * during bus mastering, then you would pass 0x00ffffff as the mask * to this function. + * + * FIXME: This should really be a platform specific issue - we should + * return false if GFP_DMA allocations may not satisfy the supplied 'mask'. */ static inline int dma_supported(struct device *dev, u64 mask) { |