diff options
| author | chenhui zhao <chenhui.zhao@freescale.com> | 2015-12-24 00:39:57 (GMT) |
|---|---|---|
| committer | Scott Wood <oss@buserror.net> | 2016-03-05 05:44:02 (GMT) |
| commit | ebb9d30a6a74f4ced5b7d35446ebb6362a724393 (patch) | |
| tree | 2efd7b3e75538b5550e273116adbba546fb859f4 /arch/powerpc/mm | |
| parent | d64716caf7724dbacd6d79249b90973bf6a9852a (diff) | |
| download | linux-ebb9d30a6a74f4ced5b7d35446ebb6362a724393.tar.xz | |
powerpc/mm: any thread in one core can be the first to setup TLB1
On e6500, in the case of cpu hotplug, either thread in one core
may be the first thread initilzing the TLB1. The subsequent threads
must not setup it again.
The code is derived from the comment of Scott Wood.
Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/tlb_nohash.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c index bb04e4d..f466848 100644 --- a/arch/powerpc/mm/tlb_nohash.c +++ b/arch/powerpc/mm/tlb_nohash.c @@ -640,9 +640,7 @@ static void early_init_this_mmu(void) * transient mapping would cause problems. */ #ifdef CONFIG_SMP - if (cpu != boot_cpuid && - (cpu != cpu_first_thread_sibling(cpu) || - cpu == cpu_first_thread_sibling(boot_cpuid))) + if (hweight32(get_tensr()) > 1) map = false; #endif |