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authorGeert Uytterhoeven <geert@linux-m68k.org>2018-03-16 16:25:43 +0300
committerChristoph Hellwig <hch@lst.de>2018-03-16 21:58:27 +0300
commitc1ce6c2beea38171a57c56e55875318cef9a2ad5 (patch)
treecbd8591cc2b16c4142c07769d9fd76a145948637 /include/linux/dmapool.h
parentab642e952f80c66c5592f0e2c35588843a813df8 (diff)
downloadlinux-c1ce6c2beea38171a57c56e55875318cef9a2ad5.tar.xz
mm: Add NO_DMA dummies for DMA pool API
Add dummies for dma{,m}_pool_{create,destroy,alloc,free}(), to allow compile-testing if NO_DMA=y. This prevents the following from showing up later: ERROR: "dma_pool_destroy" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "dma_pool_free" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "dma_pool_alloc" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "dma_pool_create" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "dma_pool_destroy" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! ERROR: "dma_pool_free" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! ERROR: "dma_pool_alloc" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! ERROR: "dma_pool_create" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! ERROR: "dma_pool_alloc" [drivers/mailbox/bcm-pdc-mailbox.ko] undefined! ERROR: "dma_pool_free" [drivers/mailbox/bcm-pdc-mailbox.ko] undefined! ERROR: "dma_pool_create" [drivers/mailbox/bcm-pdc-mailbox.ko] undefined! ERROR: "dma_pool_destroy" [drivers/mailbox/bcm-pdc-mailbox.ko] undefined! Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Mark Brown <broonie@kernel.org> Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/dmapool.h')
-rw-r--r--include/linux/dmapool.h30
1 files changed, 23 insertions, 7 deletions
diff --git a/include/linux/dmapool.h b/include/linux/dmapool.h
index 53ba737505df..f632ecfb4238 100644
--- a/include/linux/dmapool.h
+++ b/include/linux/dmapool.h
@@ -16,6 +16,8 @@
struct device;
+#ifdef CONFIG_HAS_DMA
+
struct dma_pool *dma_pool_create(const char *name, struct device *dev,
size_t size, size_t align, size_t allocation);
@@ -23,13 +25,6 @@ void dma_pool_destroy(struct dma_pool *pool);
void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle);
-
-static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
- dma_addr_t *handle)
-{
- return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle);
-}
-
void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr);
/*
@@ -39,5 +34,26 @@ struct dma_pool *dmam_pool_create(const char *name, struct device *dev,
size_t size, size_t align, size_t allocation);
void dmam_pool_destroy(struct dma_pool *pool);
+#else /* !CONFIG_HAS_DMA */
+static inline struct dma_pool *dma_pool_create(const char *name,
+ struct device *dev, size_t size, size_t align, size_t allocation)
+{ return NULL; }
+static inline void dma_pool_destroy(struct dma_pool *pool) { }
+static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
+ dma_addr_t *handle) { return NULL; }
+static inline void dma_pool_free(struct dma_pool *pool, void *vaddr,
+ dma_addr_t addr) { }
+static inline struct dma_pool *dmam_pool_create(const char *name,
+ struct device *dev, size_t size, size_t align, size_t allocation)
+{ return NULL; }
+static inline void dmam_pool_destroy(struct dma_pool *pool) { }
+#endif /* !CONFIG_HAS_DMA */
+
+static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
+ dma_addr_t *handle)
+{
+ return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle);
+}
+
#endif