Stefan Liebler
03b007771b
S390: Adjust lock elision code after review. ...
This patch adjusts s390 specific lock elision code after review
of the following patches:
-S390: Use own tbegin macro instead of __builtin_tbegin.
(8bfc4a2ab4bebdf86c151665aae8a266e2f18fb4)
-S390: Use new __libc_tbegin_retry macro in elision-lock.c.
(53c5c3d5ac238901c13f28a73ba05b0678094e80)
-S390: Optimize lock-elision by decrementing adapt_count at unlock.
(dd037fb3df286b7c2d0b0c6f8d02a2dd8a8e8a08)
The futex value is not tested before starting a transaction,
__glibc_likely is used instead of __builtin_expect and comments
are adjusted.
ChangeLog:
* sysdeps/unix/sysv/linux/s390/htm.h: Adjust comments.
* sysdeps/unix/sysv/linux/s390/elision-unlock.c: Likewise.
* sysdeps/unix/sysv/linux/s390/elision-lock.c: Adjust comments.
(__lll_lock_elision): Do not test futex before starting a
transaction. Use __glibc_likely instead of __builtin_expect.
* sysdeps/unix/sysv/linux/s390/elision-trylock.c: Adjust comments.
(__lll_trylock_elision): Do not test futex before starting a
transaction. Use __glibc_likely instead of __builtin_expect.
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