uml: SMP locking commentary
Add some more commentary about various pieces of global data not needing
locking.
Also got rid of unmap_physmem since that is no longer used.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 9c92900..9757085 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -164,10 +164,10 @@
* setup_iomem, both of which run during early boot. Afterwards, it's
* unchanged.
*/
-struct iomem_region *iomem_regions = NULL;
+struct iomem_region *iomem_regions;
-/* Initialized in parse_iomem */
-int iomem_size = 0;
+/* Initialized in parse_iomem and unchanged thereafter */
+int iomem_size;
unsigned long find_iomem(char *driver, unsigned long *len_out)
{