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tile: support CONFIG_PREEMPT

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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>
This commit is contained in:
Chris Metcalf
2013-08-07 11:36:54 -04:00
parent 1182b69cb2
commit bc1a298f4e
14 changed files with 98 additions and 45 deletions
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4
arch/tile/mm/homecache.c
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@@ -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)