raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-08 19:09:57 +00:00
Code Issues Projects Releases Wiki Activity

ARC: use ACCESS_ONCE in cmpxchg loop

Browse Source 
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta
2014-12-15 18:42:24 +05:30
parent 98edfab4c1
commit 7082a29c22
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arc/kernel/smp.c
View File

@@ -221,7 +221,7 @@ static void ipi_send_msg_one(int cpu, enum ipi_msg_type msg)
* and read back old value * and read back old value
*/ */
do { do {
new = old = *ipi_data_ptr; new = old = ACCESS_ONCE(*ipi_data_ptr);
new |= 1U << msg; new |= 1U << msg;
} while (cmpxchg(ipi_data_ptr, old, new) != old); } while (cmpxchg(ipi_data_ptr, old, new) != old);