mirror of https://gitee.com/openkylin/linux.git
2957c03539
Implement atomic logic ops -- atomic_{or,xor,and}.
For tilegx, these are relatively straightforward; the architecture
provides atomic "or" and "and", both 32-bit and 64-bit. To support
xor we provide a loop using "cmpexch".
For the older 32-bit tilepro architecture, we have to extend
the set of low-level assembly routines to include 32-bit "and",
as well as all three 64-bit routines. Somewhat confusingly,
some 32-bit versions are already used by the bitops inlines, with
parameter types appropriate for bitops, so we have to do a bit of
casting to match "int" to "unsigned long".
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1436474297-32187-1-git-send-email-cmetcalf@ezchip.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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| .. | ||
| Makefile | ||
| atomic_32.c | ||
| atomic_asm_32.S | ||
| cacheflush.c | ||
| checksum.c | ||
| cpumask.c | ||
| delay.c | ||
| exports.c | ||
| memchr_32.c | ||
| memchr_64.c | ||
| memcpy_32.S | ||
| memcpy_64.c | ||
| memcpy_user_64.c | ||
| memmove.c | ||
| memset_32.c | ||
| memset_64.c | ||
| spinlock_32.c | ||
| spinlock_64.c | ||
| spinlock_common.h | ||
| strchr_32.c | ||
| strchr_64.c | ||
| string-endian.h | ||
| strlen_32.c | ||
| strlen_64.c | ||
| strnlen_32.c | ||
| strnlen_64.c | ||
| uaccess.c | ||
| usercopy_32.S | ||
| usercopy_64.S | ||