aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/mm/tlb_nohash.c
diff options
context:
space:
mode:
authorchenhui zhao <chenhui.zhao@freescale.com>2015-12-24 08:39:57 +0800
committerScott Wood <oss@buserror.net>2016-03-04 23:44:02 -0600
commitebb9d30a6a74f4ced5b7d35446ebb6362a724393 (patch)
tree2efd7b3e75538b5550e273116adbba546fb859f4 /arch/powerpc/mm/tlb_nohash.c
parentDocumentation: dt: binding: fsl: add devicetree binding for describing RCPM (diff)
downloadlinux-dev-ebb9d30a6a74f4ced5b7d35446ebb6362a724393.tar.xz
linux-dev-ebb9d30a6a74f4ced5b7d35446ebb6362a724393.zip
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/tlb_nohash.c')
-rw-r--r--arch/powerpc/mm/tlb_nohash.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index bb04e4df3100..f4668488512c 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