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openrisc: uaccess: Use static inline function in access_ok 

As suggested by Linus when reviewing commit 9cb2feb4d2
("arch/openrisc: Fix issues with access_ok()") last year; making
__range_ok an inline function also fixes the used twice issue that the
commit was fixing.  I agree it's a good cleanup.  This patch addresses
that as I am currently working on the access_ok macro to fixup sparse
annotations in OpenRISC.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>
Reviewed-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
This commit is contained in:
Stafford Horne 2020-08-04 09:35:24 +09:00
parent 17fcd83c2b
commit af84b16e34
1 changed files with 7 additions and 4 deletions
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11
arch/openrisc/include/asm/uaccess.h
View File

@ -48,16 +48,19 @@
/* Ensure that the range from addr to addr+size is all within the process'
* address space
*/
#define __range_ok(addr, size) (size <= get_fs() && addr <= (get_fs()-size))
static inline int __range_ok(unsigned long addr, unsigned long size)
{
const mm_segment_t fs = get_fs();
return size <= fs && addr <= (fs - size);
}
/* Ensure that addr is below task's addr_limit */
#define __addr_ok(addr) ((unsigned long) addr < get_fs())
#define access_ok(addr, size) \
({ \
unsigned long __ao_addr = (unsigned long)(addr); \
unsigned long __ao_size = (unsigned long)(size); \
__range_ok(__ao_addr, __ao_size); \
__range_ok((unsigned long)(addr), (size)); \
})
/*