get_unmapped_area handles MAP_FIXED on arm

ARM already had a case for MAP_FIXED in arch_get_unmapped_area() though it was
not called before.  Fix the comment to reflect that it will now be called.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index b0b5f46..2c4c242 100644
--- a/arch/arm/mm/mmap.c
+++ b/arch/arm/mm/mmap.c
@@ -49,8 +49,7 @@
 #endif
 
 	/*
-	 * We should enforce the MAP_FIXED case.  However, currently
-	 * the generic kernel code doesn't allow us to handle this.
+	 * We enforce the MAP_FIXED case.
 	 */
 	if (flags & MAP_FIXED) {
 		if (aliasing && flags & MAP_SHARED && addr & (SHMLBA - 1))