From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: [PATCH/RFC 4/6] mm: Add NO_DMA dummies for DMA pool API Date: Tue, 6 Feb 2018 11:14:50 +0100 Message-ID: <1517912092-15470-5-git-send-email-geert@linux-m68k.org> References: <1517912092-15470-1-git-send-email-geert@linux-m68k.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1517912092-15470-1-git-send-email-geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Christoph Hellwig , Marek Szyprowski , Robin Murphy , Arnd Bergmann , Mark Brown , Richard Weinberger Cc: linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Felipe Balbi , "James E . J . Bottomley" , linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "Martin K . Petersen" , Greg Kroah-Hartman , linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Geert Uytterhoeven List-Id: iommu@lists.linux-foundation.org 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 --- include/linux/dmapool.h | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/include/linux/dmapool.h b/include/linux/dmapool.h index 53ba737505df31c7..adeb5e56c3ad73a8 100644 --- a/include/linux/dmapool.h +++ b/include/linux/dmapool.h @@ -16,6 +16,7 @@ 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); @@ -23,6 +24,17 @@ void dma_pool_destroy(struct dma_pool *pool); void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle); +void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr); +#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) { } +#endif /* !CONFIG_HAS_DMA */ static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle) @@ -30,14 +42,19 @@ static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle); } -void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr); - /* * Managed DMA pool */ +#ifdef CONFIG_HAS_DMA 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 *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 */ #endif -- 2.7.4