xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mips, thp: remove infrastructure for handling splitting PMDs

Browse Source 
With new refcounting we don't need to mark PMDs splitting.  Let's drop
code to handle this.

pmdp_splitting_flush() is not needed too: on splitting PMD we will do
pmdp_clear_flush() + set_pte_at().  pmdp_clear_flush() will do IPI as
needed for fast_gup.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.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
2016-01-15 16:53:17 -08:00
committed by Linus Torvalds
parent 0ebd744615
commit b27873702b
5 changed files with 5 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
arch/mips/include/asm/pgtable.h
View File

@@ -482,27 +482,9 @@ static inline pmd_t pmd_mkhuge(pmd_t pmd)
return pmd;
}
static inline int pmd_trans_splitting(pmd_t pmd)
{
return !!(pmd_val(pmd) & _PAGE_SPLITTING);
}
static inline pmd_t pmd_mksplitting(pmd_t pmd)
{
pmd_val(pmd) |= _PAGE_SPLITTING;
return pmd;
}
extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd);
#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
/* Extern to avoid header file madness */
extern void pmdp_splitting_flush(struct vm_area_struct *vma,
unsigned long address,
pmd_t *pmdp);
#define __HAVE_ARCH_PMD_WRITE
static inline int pmd_write(pmd_t pmd)
{