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ARM: 5740/1: fix valid_phys_addr_range() range check 

Commit 1522ac3ec9
("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>
This commit is contained in:
Greg Ungerer 2009-10-02 00:45:28 +01:00 committed by Russell King
parent 31abdb7441
commit 6806bfe18f
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mm/mmap.c
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@ -124,7 +124,7 @@ int valid_phys_addr_range(unsigned long addr, size_t size)
{
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;