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xtensa: use buddy allocator for PTE table

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At the moment xtensa uses slab allocator for PTE table.  It doesn't work
with enabled split page table lock: slab uses page->slab_cache and
page->first_page for its pages.  These fields share stroage with
page->ptl.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Chris Zankel <chris@zankel.net>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov
2013-11-14 14:31:50 -08:00
committed by Linus Torvalds
parent 01058e7076
commit f820e2805c
3 changed files with 13 additions and 30 deletions
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3
arch/xtensa/include/asm/pgtable.h
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@@ -220,12 +220,11 @@ extern unsigned long empty_zero_page[1024];
#ifdef CONFIG_MMU
extern pgd_t swapper_pg_dir[PAGE_SIZE/sizeof(pgd_t)];
extern void paging_init(void);
extern void pgtable_cache_init(void);
#else
# define swapper_pg_dir NULL
static inline void paging_init(void) { }
static inline void pgtable_cache_init(void) { }
#endif
static inline void pgtable_cache_init(void) { }
/*
* The pmd contains the kernel virtual address of the pte page.