[PATCH 3.8 59/81] sparc64: Fix ITLB handler of null page

From: Kamal Mostafa
Date: Tue Oct 29 2013 - 14:08:55 EST -stable review patch. If anyone has any objections, please let me know.


From: Kirill Tkhai <tkhai@xxxxxxxxx>

[ Upstream commit 1c2696cdaad84580545a2e9c0879ff597880b1a9 ]

1)Use kvmap_itlb_longpath instead of kvmap_dtlb_longpath.

2)Handle page #0 only, don't handle page #1: bleu -> blu

(KERNBASE is 0x400000, so #1 does not exist too. But everything
is possible in the future. Fix to not to have problems later.)

3)Remove unused kvmap_itlb_nonlinear.

Signed-off-by: Kirill Tkhai <tkhai@xxxxxxxxx>
CC: David Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
arch/sparc/kernel/ktlb.S | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/sparc/kernel/ktlb.S b/arch/sparc/kernel/ktlb.S
index 0746e5e..fde5a41 100644
--- a/arch/sparc/kernel/ktlb.S
+++ b/arch/sparc/kernel/ktlb.S
@@ -25,11 +25,10 @@ kvmap_itlb:

/* Catch kernel NULL pointer calls. */
sethi %hi(PAGE_SIZE), %g5
cmp %g4, %g5
- bleu,pn %xcc, kvmap_dtlb_longpath
+ blu,pn %xcc, kvmap_itlb_longpath

KERN_TSB_LOOKUP_TL1(%g4, %g6, %g5, %g1, %g2, %g3, kvmap_itlb_load)

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