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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/metag/include/asm/pgalloc.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/metag/include/asm/pgalloc.h')
-rw-r--r-- | kernel/arch/metag/include/asm/pgalloc.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/kernel/arch/metag/include/asm/pgalloc.h b/kernel/arch/metag/include/asm/pgalloc.h new file mode 100644 index 000000000..3104df0a4 --- /dev/null +++ b/kernel/arch/metag/include/asm/pgalloc.h @@ -0,0 +1,83 @@ +#ifndef _METAG_PGALLOC_H +#define _METAG_PGALLOC_H + +#include <linux/threads.h> +#include <linux/mm.h> + +#define pmd_populate_kernel(mm, pmd, pte) \ + set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte))) + +#define pmd_populate(mm, pmd, pte) \ + set_pmd(pmd, __pmd(_PAGE_TABLE | page_to_phys(pte))) + +#define pmd_pgtable(pmd) pmd_page(pmd) + +/* + * Allocate and free page tables. + */ +#ifdef CONFIG_METAG_META21_MMU +static inline void pgd_ctor(pgd_t *pgd) +{ + memcpy(pgd + USER_PTRS_PER_PGD, + swapper_pg_dir + USER_PTRS_PER_PGD, + (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); +} +#else +#define pgd_ctor(x) do { } while (0) +#endif + +static inline pgd_t *pgd_alloc(struct mm_struct *mm) +{ + pgd_t *pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); + if (pgd) + pgd_ctor(pgd); + return pgd; +} + +static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ + free_page((unsigned long)pgd); +} + +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address) +{ + pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | + __GFP_ZERO); + return pte; +} + +static inline pgtable_t pte_alloc_one(struct mm_struct *mm, + unsigned long address) +{ + struct page *pte; + pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0); + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } + return pte; +} + +static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) +{ + free_page((unsigned long)pte); +} + +static inline void pte_free(struct mm_struct *mm, pgtable_t pte) +{ + pgtable_page_dtor(pte); + __free_page(pte); +} + +#define __pte_free_tlb(tlb, pte, addr) \ + do { \ + pgtable_page_dtor(pte); \ + tlb_remove_page((tlb), (pte)); \ + } while (0) + +#define check_pgt_cache() do { } while (0) + +#endif |