diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-12-22 18:05:15 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-01-15 11:34:55 +0300 |
| commit | 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7 (patch) | |
| tree | 17ccc31f02cbc09c8a51c8b95acf50f0b62e366b /include | |
| parent | 205e1b7f51e4af2643eb1d61a6503e415cd1e014 (diff) | |
| download | linux-57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7.tar.xz | |
dma-mapping: clear harmful GFP_* flags in common code
Lift the code from x86 so that we behave consistently. In the future we
should probably warn if any of these is set.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/dma-mapping.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 16add66d5b68..d036e78b9ae9 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -518,6 +518,13 @@ static inline void *dma_alloc_attrs(struct device *dev, size_t size, if (dma_alloc_from_dev_coherent(dev, size, dma_handle, &cpu_addr)) return cpu_addr; + /* + * Let the implementation decide on the zone to allocate from, and + * decide on the way of zeroing the memory given that the memory + * returned should always be zeroed. + */ + flag &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM | __GFP_ZERO); + if (!arch_dma_alloc_attrs(&dev, &flag)) return NULL; if (!ops->alloc) |