diff options
Diffstat (limited to 'libexec/rtld-elf/alpha/lockdflt.c')
| -rw-r--r-- | libexec/rtld-elf/alpha/lockdflt.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/libexec/rtld-elf/alpha/lockdflt.c b/libexec/rtld-elf/alpha/lockdflt.c index 5847abbb1117..83ab3dc990d7 100644 --- a/libexec/rtld-elf/alpha/lockdflt.c +++ b/libexec/rtld-elf/alpha/lockdflt.c @@ -39,11 +39,6 @@ * contain a count of readers desiring the lock. The algorithm requires * atomic "compare_and_store" and "add" operations, which we implement * using assembly language sequences in "rtld_start.S". - * - * These are spinlocks. When spinning we call nanosleep() for 1 - * microsecond each time around the loop. This will most likely yield - * the CPU to other threads (including, we hope, the lockholder) allowing - * them to make some progress. */ #include <signal.h> @@ -70,7 +65,6 @@ typedef struct Struct_Lock { void *base; } Lock; -static const struct timespec usec = { 0, 1000 }; /* 1 usec. */ static sigset_t fullsigmask, oldsigmask; static void * @@ -118,7 +112,7 @@ rlock_acquire(void *lock) atomic_add_int(&l->lock, RC_INCR); while (l->lock & WAFLAG) - nanosleep(&usec, NULL); + ; /* Spin */ } static void @@ -132,7 +126,6 @@ wlock_acquire(void *lock) if (cmp0_and_store_int(&l->lock, WAFLAG) == 0) break; sigprocmask(SIG_SETMASK, &tmp_oldsigmask, NULL); - nanosleep(&usec, NULL); } oldsigmask = tmp_oldsigmask; } |