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MIPS: Fix PKMAP with 32-bit MIPS huge page support 

[ Upstream commit cf02ce742f09188272bcc8b0e62d789eb671fc4c ]

When 32-bit MIPS huge page support is enabled, we halve the number of
pointers a PTE page holds, making its last half go to waste.
Correspondingly, we should halve the number of kmap entries, as we just
initialized only a single pte table for that in pagetable_init().

Fixes: 35476311e5 ("MIPS: Add partial 32-bit huge page support")
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wei Li 2021-06-29 22:14:20 +08:00 committed by Greg Kroah-Hartman
parent 97704efb93
commit e0aef648f5
1 changed files with 1 additions and 1 deletions
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arch/mips/include/asm/highmem.h
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@ -36,7 +36,7 @@ extern pte_t *pkmap_page_table;
* easily, subsequent pte tables have to be allocated in one physical
* chunk of RAM.
*/
#ifdef CONFIG_PHYS_ADDR_T_64BIT
#if defined(CONFIG_PHYS_ADDR_T_64BIT) || defined(CONFIG_MIPS_HUGE_TLB_SUPPORT)
#define LAST_PKMAP 512
#else
#define LAST_PKMAP 1024