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MIPS: mm: Fix broken microMIPS kernel regression. 

Commit f4ae17aa0f [MIPS: mm: Use scratch for
PGD when !CONFIG_MIPS_PGD_C0_CONTEXT] broke microMIPS kernel builds. This
patch refactors that code similar to what was done for the 'clear_page'
and 'copy_page' functions.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6744/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Steven J. Hill 2014-04-10 14:06:17 -05:00 committed by Ralf Baechle
parent f2d0801f00
commit 7bb3940940
2 changed files with 7 additions and 4 deletions
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4
arch/mips/mm/tlb-funcs.S
View File

@ -16,8 +16,10 @@
#define FASTPATH_SIZE 128
EXPORT(tlbmiss_handler_setup_pgd_start)
LEAF(tlbmiss_handler_setup_pgd)
.space 16 * 4
1: j 1b /* Dummy, will be replaced. */
.space 64
END(tlbmiss_handler_setup_pgd)
EXPORT(tlbmiss_handler_setup_pgd_end)

7
arch/mips/mm/tlbex.c
View File

@ -1422,16 +1422,17 @@ static void build_r4000_tlb_refill_handler(void)
extern u32 handle_tlbl[], handle_tlbl_end[];
extern u32 handle_tlbs[], handle_tlbs_end[];
extern u32 handle_tlbm[], handle_tlbm_end[];
extern u32 tlbmiss_handler_setup_pgd[], tlbmiss_handler_setup_pgd_end[];
extern u32 tlbmiss_handler_setup_pgd_start[], tlbmiss_handler_setup_pgd[];
extern u32 tlbmiss_handler_setup_pgd_end[];
static void build_setup_pgd(void)
{
const int a0 = 4;
const int __maybe_unused a1 = 5;
const int __maybe_unused a2 = 6;
u32 *p = tlbmiss_handler_setup_pgd;
u32 *p = tlbmiss_handler_setup_pgd_start;
const int tlbmiss_handler_setup_pgd_size =
tlbmiss_handler_setup_pgd_end - tlbmiss_handler_setup_pgd;
tlbmiss_handler_setup_pgd_end - tlbmiss_handler_setup_pgd_start;
#ifndef CONFIG_MIPS_PGD_C0_CONTEXT
long pgdc = (long)pgd_current;
#endif