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Commit fe3cc0d9 authored Feb 28, 2011 by Anton Blanchard Committed by Benjamin Herrenschmidt Mar 02, 2011

powerpc: Add pgprot_writecombine



A number of drivers are using pgprot_writecombine() to enable write
combining on userspace mappings. Implement it on powerpc.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent a9d8946b

arch/powerpc/include/asm/pgtable.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -170,6 +170,7 @@ extern int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long addre
		#define pgprot_cached_wthru(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) \| \
		_PAGE_COHERENT \| _PAGE_WRITETHRU))

		#define pgprot_writecombine pgprot_noncached_wc

		struct file;
		extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,