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microblaze: Fix access_ok macro

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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>
This commit is contained in:
Michal Simek 2011-07-28 15:23:37 +02:00
parent ebe211254b
commit 41b7602ed1
1 changed files with 1 additions and 1 deletions
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2
arch/microblaze/include/asm/uaccess.h
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@ -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",