hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Revert "ARCv2: spinlock/rwlock/atomics: reduce 1 instruction in exponential backoff" 

This reverts commit 1097163870.

The issue was fixed in hardware in HS2.1C release and there are no known
external users of affected RTL - so revert thw whole delayed retry
series !

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2016-05-31 16:31:33 +05:30
parent d140b9bfca
commit 42316a201a
2 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arc/include/asm/atomic.h
View File

@ -36,7 +36,8 @@
" mov %[tmp], %[delay] \n" /* tmp = delay */ \
"2: brne.d %[tmp], 0, 2b \n" /* while (tmp != 0) */ \
" sub %[tmp], %[tmp], 1 \n" /* tmp-- */ \
" rol %[delay], %[delay] \n" /* delay *= 2 */ \
" asl.f %[delay], %[delay], 1 \n" /* delay *= 2 */ \
" mov.z %[delay], 1 \n" /* handle overflow */ \
" b 1b \n" /* start over */ \
"4: ; --- success --- \n" \

3
arch/arc/include/asm/spinlock.h
View File

@ -260,7 +260,8 @@ static inline void arch_write_unlock(arch_rwlock_t *rw)
" mov %[tmp], %[delay] \n" /* tmp = delay */ \
"2: brne.d %[tmp], 0, 2b \n" /* while (tmp != 0) */ \
" sub %[tmp], %[tmp], 1 \n" /* tmp-- */ \
" rol %[delay], %[delay] \n" /* delay *= 2 */ \
" asl.f %[delay], %[delay], 1 \n" /* delay *= 2 */ \
" mov.z %[delay], 1 \n" /* handle overflow */ \
" b 1b \n" /* start over */ \
" \n" \
"4: ; --- done --- \n" \