mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-14 06:35:12 +00:00
1c2f7d14d8
Currently most platforms define pmd_pgtable() as pmd_page() duplicating the same code all over. Instead just define a default value i.e pmd_page() for pmd_pgtable() and let platforms override when required via <asm/pgtable.h>. All the existing platform that override pmd_pgtable() have been moved into their respective <asm/pgtable.h> header in order to precede before the new generic definition. This makes it much cleaner with reduced code. Link: https://lkml.kernel.org/r/1623646133-20306-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Nick Hu <nickhu@andestech.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Guo Ren <guoren@kernel.org> Cc: Brian Cain <bcain@codeaurora.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Stafford Horne <shorne@gmail.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
73 lines
2 KiB
C
73 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_PGALLOC_H
|
|
#define _ASM_POWERPC_PGALLOC_H
|
|
|
|
#include <linux/mm.h>
|
|
|
|
#ifndef MODULE
|
|
static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
|
|
{
|
|
if (unlikely(mm == &init_mm))
|
|
return gfp;
|
|
return gfp | __GFP_ACCOUNT;
|
|
}
|
|
#else /* !MODULE */
|
|
static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
|
|
{
|
|
return gfp | __GFP_ACCOUNT;
|
|
}
|
|
#endif /* MODULE */
|
|
|
|
#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)
|
|
|
|
pte_t *pte_fragment_alloc(struct mm_struct *mm, int kernel);
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
|
|
{
|
|
return (pte_t *)pte_fragment_alloc(mm, 1);
|
|
}
|
|
|
|
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
|
|
{
|
|
return (pgtable_t)pte_fragment_alloc(mm, 0);
|
|
}
|
|
|
|
void pte_frag_destroy(void *pte_frag);
|
|
void pte_fragment_free(unsigned long *table, int kernel);
|
|
|
|
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
|
{
|
|
pte_fragment_free((unsigned long *)pte, 1);
|
|
}
|
|
|
|
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
|
|
{
|
|
pte_fragment_free((unsigned long *)ptepage, 0);
|
|
}
|
|
|
|
/*
|
|
* Functions that deal with pagetables that could be at any level of
|
|
* the table need to be passed an "index_size" so they know how to
|
|
* handle allocation. For PTE pages, the allocation size will be
|
|
* (2^index_size * sizeof(pointer)) and allocations are drawn from
|
|
* the kmem_cache in PGT_CACHE(index_size).
|
|
*
|
|
* The maximum index size needs to be big enough to allow any
|
|
* pagetable sizes we need, but small enough to fit in the low bits of
|
|
* any page table pointer. In other words all pagetables, even tiny
|
|
* ones, must be aligned to allow at least enough low 0 bits to
|
|
* contain this value. This value is also used as a mask, so it must
|
|
* be one less than a power of two.
|
|
*/
|
|
#define MAX_PGTABLE_INDEX_SIZE 0xf
|
|
|
|
extern struct kmem_cache *pgtable_cache[];
|
|
#define PGT_CACHE(shift) pgtable_cache[shift]
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S
|
|
#include <asm/book3s/pgalloc.h>
|
|
#else
|
|
#include <asm/nohash/pgalloc.h>
|
|
#endif
|
|
|
|
#endif /* _ASM_POWERPC_PGALLOC_H */
|