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| author | Mike Rapoport <rppt@linux.ibm.com> | 2020-08-07 09:22:39 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-07 21:33:26 +0300 |
| commit | 1355c31eeb7ea61a7f2f2937d17cd4e343a6b5af (patch) | |
| tree | d4fb6613355844ad2f28283178f511c5b1e3d35e /arch/sh/include | |
| parent | 7278914ca1fdb54ba101c8617fb86953b31348cd (diff) | |
| download | linux-1355c31eeb7ea61a7f2f2937d17cd4e343a6b5af.tar.xz | |
asm-generic: pgalloc: provide generic pmd_alloc_one() and pmd_free_one()
For most architectures that support >2 levels of page tables,
pmd_alloc_one() is a wrapper for __get_free_pages(), sometimes with
__GFP_ZERO and sometimes followed by memset(0) instead.
More elaborate versions on arm64 and x86 account memory for the user page
tables and call to pgtable_pmd_page_ctor() as the part of PMD page
initialization.
Move the arm64 version to include/asm-generic/pgalloc.h and use the
generic version on several architectures.
The pgtable_pmd_page_ctor() is a NOP when ARCH_ENABLE_SPLIT_PMD_PTLOCK is
not enabled, so there is no functional change for most architectures
except of the addition of __GFP_ACCOUNT for allocation of user page
tables.
The pmd_free() is a wrapper for free_page() in all the cases, so no
functional change here.
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: Matthew Wilcox <willy@infradead.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>
Link: http://lkml.kernel.org/r/20200627143453.31835-5-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sh/include')
| -rw-r--r-- | arch/sh/include/asm/pgalloc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h index d770da3f8b6f..811afb567101 100644 --- a/arch/sh/include/asm/pgalloc.h +++ b/arch/sh/include/asm/pgalloc.h @@ -3,6 +3,9 @@ #define __ASM_SH_PGALLOC_H #include <asm/page.h> + +#define __HAVE_ARCH_PMD_ALLOC_ONE +#define __HAVE_ARCH_PMD_FREE #include <asm-generic/pgalloc.h> extern pgd_t *pgd_alloc(struct mm_struct *); |