alpha: fix ALSA DMA mmap crash

Make dma_alloc_coherent respect gfp flags (__GFP_COMP is one that
matters).

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Tested-by: Michael Cree <mcree@orcon.net.nz>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/alpha/kernel/pci_iommu.c

@@ -424,11 +424,13 @@ EXPORT_SYMBOL(pci_unmap_page);
    else DMA_ADDRP is undefined.  */
 
 void *
-pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
+__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
+		       dma_addr_t *dma_addrp, gfp_t gfp)
 {
 	void *cpu_addr;
 	long order = get_order(size);
-	gfp_t gfp = GFP_ATOMIC;
+
+	gfp &= ~GFP_DMA;
 
 try_again:
 	cpu_addr = (void *)__get_free_pages(gfp, order);
@@ -458,7 +460,7 @@ try_again:
 
 	return cpu_addr;
 }
-EXPORT_SYMBOL(pci_alloc_consistent);
+EXPORT_SYMBOL(__pci_alloc_consistent);
 
 /* Free and unmap a consistent DMA buffer.  CPU_ADDR and DMA_ADDR must
    be values that were returned from pci_alloc_consistent.  SIZE must

include/asm-alpha/dma-mapping.h

@@ -11,7 +11,7 @@
 #define dma_unmap_single(dev, addr, size, dir)		\
 		pci_unmap_single(alpha_gendev_to_pci(dev), addr, size, dir)
 #define dma_alloc_coherent(dev, size, addr, gfp)	\
-		pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr)
+	      __pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr, gfp)
 #define dma_free_coherent(dev, size, va, addr)		\
 		pci_free_consistent(alpha_gendev_to_pci(dev), size, va, addr)
 #define dma_map_page(dev, page, off, size, dir)		\

include/asm-alpha/pci.h

@@ -76,7 +76,13 @@ extern inline void pcibios_penalize_isa_irq(int irq, int active)
    successful and sets *DMA_ADDRP to the pci side dma address as well,
    else DMA_ADDRP is undefined.  */
 
-extern void *pci_alloc_consistent(struct pci_dev *, size_t, dma_addr_t *);
+extern void *__pci_alloc_consistent(struct pci_dev *, size_t,
+				    dma_addr_t *, gfp_t);
+static inline void *
+pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma)
+{
+	return __pci_alloc_consistent(dev, size, dma, GFP_ATOMIC);
+}
 
 /* Free and unmap a consistent DMA buffer.  CPU_ADDR and DMA_ADDR must
    be values that were returned from pci_alloc_consistent.  SIZE must