diff options
| author | Lucas Stach <l.stach@pengutronix.de> | 2017-02-25 01:58:41 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-25 04:46:55 +0300 |
| commit | e2f466e32f56c8b3ee0d1a40cc39e1c779dfd598 (patch) | |
| tree | f37685b18f07689ed884b912f226b9a19c320e7a | |
| parent | ca96b625341027f611c3e61351a70311077ebcf5 (diff) | |
| download | linux-e2f466e32f56c8b3ee0d1a40cc39e1c779dfd598.tar.xz | |
mm: cma_alloc: allow to specify GFP mask
Most users of this interface just want to use it with the default
GFP_KERNEL flags, but for cases where DMA memory is allocated it may be
called from a different context.
No functional change yet, just passing through the flag to the
underlying alloc_contig_range function.
Link: http://lkml.kernel.org/r/20170127172328.18574-2-l.stach@pengutronix.de
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Alexander Graf <agraf@suse.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_builtin.c | 3 | ||||
| -rw-r--r-- | drivers/base/dma-contiguous.c | 2 | ||||
| -rw-r--r-- | include/linux/cma.h | 3 | ||||
| -rw-r--r-- | mm/cma.c | 5 | ||||
| -rw-r--r-- | mm/cma_debug.c | 2 |
5 files changed, 9 insertions, 6 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c index c42a7e63b39e..4d6c64b3041c 100644 --- a/arch/powerpc/kvm/book3s_hv_builtin.c +++ b/arch/powerpc/kvm/book3s_hv_builtin.c @@ -56,7 +56,8 @@ struct page *kvm_alloc_hpt_cma(unsigned long nr_pages) { VM_BUG_ON(order_base_2(nr_pages) < KVM_CMA_CHUNK_ORDER - PAGE_SHIFT); - return cma_alloc(kvm_cma, nr_pages, order_base_2(HPT_ALIGN_PAGES)); + return cma_alloc(kvm_cma, nr_pages, order_base_2(HPT_ALIGN_PAGES), + GFP_KERNEL); } EXPORT_SYMBOL_GPL(kvm_alloc_hpt_cma); diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c index e167a1e1bccb..d1a9cbabc627 100644 --- a/drivers/base/dma-contiguous.c +++ b/drivers/base/dma-contiguous.c @@ -193,7 +193,7 @@ struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, if (align > CONFIG_CMA_ALIGNMENT) align = CONFIG_CMA_ALIGNMENT; - return cma_alloc(dev_get_cma_area(dev), count, align); + return cma_alloc(dev_get_cma_area(dev), count, align, GFP_KERNEL); } /** diff --git a/include/linux/cma.h b/include/linux/cma.h index 6f0a91b37f68..03f32d0bd1d8 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -29,6 +29,7 @@ extern int __init cma_declare_contiguous(phys_addr_t base, extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, unsigned int order_per_bit, struct cma **res_cma); -extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align); +extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, + gfp_t gfp_mask); extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); #endif @@ -357,7 +357,8 @@ err: * This function allocates part of contiguous memory on specific * contiguous memory area. */ -struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align) +struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, + gfp_t gfp_mask) { unsigned long mask, offset; unsigned long pfn = -1; @@ -403,7 +404,7 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align) pfn = cma->base_pfn + (bitmap_no << cma->order_per_bit); mutex_lock(&cma_mutex); ret = alloc_contig_range(pfn, pfn + count, MIGRATE_CMA, - GFP_KERNEL); + gfp_mask); mutex_unlock(&cma_mutex); if (ret == 0) { page = pfn_to_page(pfn); diff --git a/mm/cma_debug.c b/mm/cma_debug.c index f8e4b60db167..ffc0c3d0ae64 100644 --- a/mm/cma_debug.c +++ b/mm/cma_debug.c @@ -138,7 +138,7 @@ static int cma_alloc_mem(struct cma *cma, int count) if (!mem) return -ENOMEM; - p = cma_alloc(cma, count, 0); + p = cma_alloc(cma, count, 0, GFP_KERNEL); if (!p) { kfree(mem); return -ENOMEM; |