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asm-generic: pgalloc: provide generic pud_alloc_one() and pud_free_one()

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Several architectures define pud_alloc_one() as a wrapper for
__get_free_page() and pud_free() as a wrapper for free_page().

Provide a generic implementation in asm-generic/pgalloc.h and use it where
appropriate.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-6-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2020-08-06 23:22:44 -07:00 committed by Linus Torvalds
parent 1355c31eeb
commit d9e8b92967
5 changed files with 31 additions and 40 deletions
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11
arch/arm64/include/asm/pgalloc.h
View File

@ -37,17 +37,6 @@ static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
#if CONFIG_PGTABLE_LEVELS > 3
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
return (pud_t *)__get_free_page(GFP_PGTABLE_USER);
}
static inline void pud_free(struct mm_struct *mm, pud_t *pudp)
{
BUG_ON((unsigned long)pudp & (PAGE_SIZE-1));
free_page((unsigned long)pudp);
}
static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
{
set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot));

9
arch/ia64/include/asm/pgalloc.h
View File

@ -41,15 +41,6 @@ p4d_populate(struct mm_struct *mm, p4d_t * p4d_entry, pud_t * pud)
p4d_val(*p4d_entry) = __pa(pud);
}
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
return (pud_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
}
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
{
free_page((unsigned long)pud);
}
#define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud)
#endif /* CONFIG_PGTABLE_LEVELS == 4 */

6
arch/mips/include/asm/pgalloc.h
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@ -14,6 +14,7 @@
#include <linux/sched.h>
#define __HAVE_ARCH_PMD_ALLOC_ONE
#define __HAVE_ARCH_PUD_ALLOC_ONE
#include <asm-generic/pgalloc.h>
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
@ -87,11 +88,6 @@ static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
return pud;
}
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
{
free_pages((unsigned long)pud, PUD_ORDER);
}
static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
{
set_p4d(p4d, __p4d((unsigned long)pud));

15
arch/x86/include/asm/pgalloc.h
View File

@ -123,21 +123,6 @@ static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d, pud_t *pu
set_p4d_safe(p4d, __p4d(_PAGE_TABLE | __pa(pud)));
}
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
gfp_t gfp = GFP_KERNEL_ACCOUNT;
if (mm == &init_mm)
gfp &= ~__GFP_ACCOUNT;
return (pud_t *)get_zeroed_page(gfp);
}
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
{
BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
free_page((unsigned long)pud);
}
extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,

30
include/asm-generic/pgalloc.h
View File

@ -145,6 +145,36 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
#endif /* CONFIG_PGTABLE_LEVELS > 2 */
#if CONFIG_PGTABLE_LEVELS > 3
#ifndef __HAVE_ARCH_PUD_FREE
/**
* pud_alloc_one - allocate a page for PUD-level page table
* @mm: the mm_struct of the current context
*
* Allocates a page using %GFP_PGTABLE_USER for user context and
* %GFP_PGTABLE_KERNEL for kernel context.
*
* Return: pointer to the allocated memory or %NULL on error
*/
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
gfp_t gfp = GFP_PGTABLE_USER;
if (mm == &init_mm)
gfp = GFP_PGTABLE_KERNEL;
return (pud_t *)get_zeroed_page(gfp);
}
#endif
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
{
BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
free_page((unsigned long)pud);
}
#endif /* CONFIG_PGTABLE_LEVELS > 3 */
#endif /* CONFIG_MMU */
#endif /* __ASM_GENERIC_PGALLOC_H */