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| author | kib <kib@FreeBSD.org> | 2015-08-12 09:46:39 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2015-08-12 09:46:39 +0000 |
| commit | 9458aa2b576bc8a0820858af28632bcabebd4a48 (patch) | |
| tree | 2b6d336c28863402a29ce09a9837897f501fe0a0 /sys/i386 | |
| parent | bff0ec5bef3ded3c67c6216c640936ddc7ecc6cc (diff) | |
| download | FreeBSD-src-9458aa2b576bc8a0820858af28632bcabebd4a48.zip FreeBSD-src-9458aa2b576bc8a0820858af28632bcabebd4a48.tar.gz | |
Initialization of smp_tlb_wait does not require release semantic, no
data is synchronized by store/load to the variable. The
lapic_write_icr() function ensures that store buffers are flushed
before IPI command is issued.
Discussed with: bde
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/i386/mp_machdep.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/i386/i386/mp_machdep.c b/sys/i386/i386/mp_machdep.c index 93845ef..9b8b9c9 100644 --- a/sys/i386/i386/mp_machdep.c +++ b/sys/i386/i386/mp_machdep.c @@ -504,7 +504,7 @@ smp_tlb_shootdown(u_int vector, vm_offset_t addr1, vm_offset_t addr2) mtx_lock_spin(&smp_ipi_mtx); smp_tlb_addr1 = addr1; smp_tlb_addr2 = addr2; - atomic_store_rel_int(&smp_tlb_wait, 0); + smp_tlb_wait = 0; ipi_all_but_self(vector); while (smp_tlb_wait < ncpu) ia32_pause(); |
