Commit 41b7602e authored Jul 28, 2011 by Michal Simek

microblaze: Fix access_ok macro



There is the problem with bit OR (|) because for
some combination is addr | size | addr+size equal
to seq.

For standard kernel setting (kernel starts at 0xC0000000)
is seq for user space 0xBFFFFFFF and everything below
this limit is fine.

But even address 0xBFFFFFFF is fine because it
is below kernel space.

Signed-off-by: Andrew Fedonczuk <andrew.fedonczuk@ericsson.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

parent ebe21125

arch/microblaze/include/asm/uaccess.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -95,7 +95,7 @@ static inline int ___range_ok(unsigned long addr, unsigned long size)
		* - "addr", "addr + size" and "size" are all below the limit
		*/
		#define access_ok(type, addr, size) \
		(get_fs().seg > (((unsigned long)(addr)) \| \
		(get_fs().seg >= (((unsigned long)(addr)) \| \
		(size) \| ((unsigned long)(addr) + (size))))

		/* \|\| printk("access_ok failed for %s at 0x%08lx (size %d), seg 0x%08x\n",