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mm/cma: remove unsupported gfp_mask parameter from cma_alloc()

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cma_alloc() doesn't really support gfp flags other than __GFP_NOWARN, so
convert gfp_mask parameter to boolean no_warn parameter.

This will help to avoid giving false feeling that this function supports
standard gfp flags and callers can pass __GFP_ZERO to get zeroed buffer,
what has already been an issue: see commit dd65a941f6 ("arm64:
dma-mapping: clear buffers allocated with FORCE_CONTIGUOUS flag").

Link: http://lkml.kernel.org/r/20180709122019eucas1p2340da484acfcc932537e6014f4fd2c29~-sqTPJKij2939229392eucas1p2j@eucas1p2.samsung.com
Signed-off-by: Marek Szyprowski <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Michał Nazarewicz <[email protected]>
Acked-by: Laura Abbott <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Marek Szyprowski 2018-08-17 15:48:57 -07:00 • committed by Linus Torvalds
commit 6518202970
7 changed files with 11 additions and 10 deletions
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2
drivers/s390/char/vmcp.c
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@ -68,7 +68,7 @@ static void vmcp_response_alloc(struct vmcp_session *session)
* anymore the system won't work anyway.
*/
if (order > 2)
page = cma_alloc(vmcp_cma, nr_pages, 0, GFP_KERNEL);
page = cma_alloc(vmcp_cma, nr_pages, 0, false);
if (page) {
session->response = (char *)page_to_phys(page);
session->cma_alloc = 1;