pci-dma-compat: add pci_zalloc_consistent helper

Add this helper for consistency with pci_zalloc_coherent
and the ability to remove unnecessary memset(,0,) uses.

Signed-off-by: Joe Perches <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: "John W. Linville" <[email protected]>
Cc: "Stephen M. Cameron" <[email protected]>
Cc: Adam Radford <[email protected]>
Cc: Chaoming Li <[email protected]>
Cc: Chas Williams <[email protected]>
Cc: Christian Benvenuti <[email protected]>
Cc: Christopher Harrer <[email protected]>
Cc: Dario Ballabio <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Don Fry <[email protected]>
Cc: Faisal Latif <[email protected]>
Cc: Forest Bond <[email protected]>
Cc: Govindarajulu Varadarajan <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Hal Rosenstock <[email protected]>
Cc: Hans Verkuil <[email protected]>
Cc: Jayamohan Kallickal <[email protected]>
Cc: Jiri Slaby <[email protected]>
Cc: Jitendra Kalsaria <[email protected]>
Cc: Larry Finger <[email protected]>
Cc: Lennert Buytenhek <[email protected]>
Cc: Lior Dotan <[email protected]>
Cc: Manish Chopra <[email protected]>
Cc: Manohar Vanga <[email protected]>
Cc: Martyn Welch <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Michael Neuffer <[email protected]>
Cc: Mirko Lindner <[email protected]>
Cc: Neel Patel <[email protected]>
Cc: Neela Syam Kolli <[email protected]>
Cc: Rajesh Borundia <[email protected]>
Cc: Roland Dreier <[email protected]>
Cc: Ron Mercer <[email protected]>
Cc: Samuel Ortiz <[email protected]>
Cc: Sean Hefty <[email protected]>
Cc: Shahed Shaikh <[email protected]>
Cc: Sony Chacko <[email protected]>
Cc: Stanislav Yakovlev <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Steve Wise <[email protected]>
Cc: Sujith Sankar <[email protected]>
Cc: Tom Tucker <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/asm-generic/pci-dma-compat.h b/include/asm-generic/pci-dma-compat.h
index 1437b7da09b2..c110843fc53b 100644
--- a/include/asm-generic/pci-dma-compat.h
+++ b/include/asm-generic/pci-dma-compat.h
@@ -19,6 +19,14 @@ pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
 	return dma_alloc_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, dma_handle, GFP_ATOMIC);
 }
 
+static inline void *
+pci_zalloc_consistent(struct pci_dev *hwdev, size_t size,
+		      dma_addr_t *dma_handle)
+{
+	return dma_zalloc_coherent(hwdev == NULL ? NULL : &hwdev->dev,
+				   size, dma_handle, GFP_ATOMIC);
+}
+
 static inline void
 pci_free_consistent(struct pci_dev *hwdev, size_t size,
 		    void *vaddr, dma_addr_t dma_handle)