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authorLucas Stach <l.stach@pengutronix.de>2017-02-25 01:58:41 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-25 04:46:55 +0300
commite2f466e32f56c8b3ee0d1a40cc39e1c779dfd598 (patch)
treef37685b18f07689ed884b912f226b9a19c320e7a
parentca96b625341027f611c3e61351a70311077ebcf5 (diff)
downloadlinux-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.c3
-rw-r--r--drivers/base/dma-contiguous.c2
-rw-r--r--include/linux/cma.h3
-rw-r--r--mm/cma.c5
-rw-r--r--mm/cma_debug.c2
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
diff --git a/mm/cma.c b/mm/cma.c
index c6aed23ca6df..2906ae5a83ff 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -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;