ARM: 5740/1: fix valid_phys_addr_range() range check
Commit 1522ac3ec95ff0230e7aa516f86b674fdf72866c
("Fix virtual to physical translation macro corner cases")
breaks the end of memory check in valid_phys_addr_range().
The modified expression results in the apparent /dev/mem size
being 2 bytes smaller than what it actually is.
This patch reworks the expression to correctly check the address,
while maintaining use of a valid address to __pa().
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index f7457fe..2b79964 100644
--- a/arch/arm/mm/mmap.c
+++ b/arch/arm/mm/mmap.c
@@ -124,7 +124,7 @@
{
if (addr < PHYS_OFFSET)
return 0;
- if (addr + size >= __pa(high_memory - 1))
+ if (addr + size > __pa(high_memory - 1) + 1)
return 0;
return 1;
