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tile: don't assume user privilege is zero

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Technically, user privilege is anything less than kernel
privilege.  We modify the existing user_mode() macro to have
this semantic (and use it in a couple of places it wasn't being
used before), and add an IS_KERNEL_EX1() macro to the assembly
code as well.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2013-09-03 14:45:52 -04:00
parent 309272f99f
commit 051168df52
5 changed files with 23 additions and 12 deletions
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4
arch/tile/mm/fault.c
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@@ -283,7 +283,7 @@ static int handle_page_fault(struct pt_regs *regs,
flags = (FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
(write ? FAULT_FLAG_WRITE : 0));
is_kernel_mode = (EX1_PL(regs->ex1) != USER_PL);
is_kernel_mode = !user_mode(regs);
tsk = validate_current();
@@ -824,7 +824,7 @@ void do_page_fault(struct pt_regs *regs, int fault_num,
}
#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC()
if (EX1_PL(regs->ex1) != USER_PL) {
if (!user_mode(regs)) {
struct async_tlb *async;
switch (fault_num) {
#if CHIP_HAS_TILE_DMA()