[PATCH] ARM: 2784/1: Fix the block cache flush operation range

Patch from Catalin Marinas

The range for the ARMv6 block cache operations is inclusive but the
kernel doesn't re-calculate the end address, causing a page fault when
used (this only happens with support for cache aliasing, otherwise the
blk_flush_kern_dcache_page() is not called). This patch subtracts
L1_CACHE_BYTES from the end address.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/blockops.c

@@ -25,13 +25,14 @@ blk_flush_kern_dcache_page(void *kaddr)
 {
 	asm(
 	"add	r1, r0, %0							\n\
+	sub	r1, r1, %1							\n\
 1:	.word	0xec401f0e	@ mcrr	p15, 0, r0, r1, c14, 0	@ blocking	\n\
 	mov	r0, #0								\n\
 	mcr	p15, 0, r0, c7, c5, 0						\n\
 	mcr	p15, 0, r0, c7, c10, 4						\n\
 	mov	pc, lr"
 	:
-	: "I" (PAGE_SIZE));
+	: "I" (PAGE_SIZE), "I" (L1_CACHE_BYTES));
 }
 
 /*