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authorChris Metcalf <cmetcalf@tilera.com>2013-08-07 11:36:54 -0400
committerChris Metcalf <cmetcalf@tilera.com>2013-08-13 16:26:01 -0400
commitbc1a298f4e04833db4c430df59b90039f0170515 (patch)
tree802da739309efeab62317f62ec4f1989f3f7d8dd /arch/tile/mm
parent1182b69cb24c4f7d7ee8c8afe41b5ab2bc05a15b (diff)
tile: support CONFIG_PREEMPT
This change adds support for CONFIG_PREEMPT (full kernel preemption). In addition to the core support, this change includes a number of places where we fix up uses of smp_processor_id() and per-cpu variables. I also eliminate the PAGE_HOME_HERE and PAGE_HOME_UNKNOWN values for page homing, as it turns out they weren't being used. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/mm')
-rw-r--r--arch/tile/mm/homecache.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c
index 1ae911939a18..df46a2d5bdf0 100644
--- a/arch/tile/mm/homecache.c
+++ b/arch/tile/mm/homecache.c
@@ -172,7 +172,8 @@ void flush_remote(unsigned long cache_pfn, unsigned long cache_control,
static void homecache_finv_page_va(void* va, int home)
{
- if (home == smp_processor_id()) {
+ int cpu = get_cpu();
+ if (home == cpu) {
finv_buffer_local(va, PAGE_SIZE);
} else if (home == PAGE_HOME_HASH) {
finv_buffer_remote(va, PAGE_SIZE, 1);
@@ -180,6 +181,7 @@ static void homecache_finv_page_va(void* va, int home)
BUG_ON(home < 0 || home >= NR_CPUS);
finv_buffer_remote(va, PAGE_SIZE, 0);
}
+ put_cpu();
}
void homecache_finv_map_page(struct page *page, int home)