aboutsummaryrefslogtreecommitdiff
path: root/arch/ia64/mm
diff options
context:
space:
mode:
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2007-10-16 01:25:44 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:42:59 -0700
commit954ffcb35f5aca428661d29b96c4eee82b3c19cd (patch)
tree2dd8aaf26a8ae81b461b6d5d824ae8744690e483 /arch/ia64/mm
parent97ee052461446526e1de7236497e6f1b1ffedf8c (diff)
flush icache before set_pte() on ia64: flush icache at set_pte
Current ia64 kernel flushes icache by lazy_mmu_prot_update() *after* set_pte(). This is too late. This patch removes lazy_mmu_prot_update and add modfied set_pte() for flushing if necessary. This patch flush icache of a page when new pte has exec bit. && new pte has present bit && new pte is user's page. && (old *ptep is not present || new pte's pfn is not same to old *ptep's ptn) && new pte's page has no Pg_arch_1 bit. Pg_arch_1 is set when a page is cache consistent. I think this condition checks are much easier to understand than considering "Where sync_icache_dcache() should be inserted ?". pte_user() for ia64 was removed by http://lkml.org/lkml/2007/6/12/67 as clean-up. So, I added it again. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/ia64/mm')
-rw-r--r--arch/ia64/mm/init.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index c14abefabaf..a096b30734f 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -54,15 +54,12 @@ struct page *zero_page_memmap_ptr; /* map entry for zero page */
EXPORT_SYMBOL(zero_page_memmap_ptr);
void
-lazy_mmu_prot_update (pte_t pte)
+__ia64_sync_icache_dcache (pte_t pte)
{
unsigned long addr;
struct page *page;
unsigned long order;
- if (!pte_exec(pte))
- return; /* not an executable page... */
-
page = pte_page(pte);
addr = (unsigned long) page_address(page);