renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-15 08:44:14 +08:00
Code

s390/mm: use pmd_pgtable_page() helper in __gmap_segment_gaddr()

Browse Source 
In __gmap_segment_gaddr() pmd level page table page is being extracted
from the pmd pointer, similar to pmd_pgtable_page() implementation.  This
reduces some redundancy by directly using pmd_pgtable_page() instead,
though first making it available.

Link: https://lkml.kernel.org/r/20221125034502.1559986-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Anshuman Khandual 2022-11-25 09:15:02 +05:30 committed by Andrew Morton
parent 373dfda2ba
commit 7e25de77bc
2 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/s390/mm/gmap.c
View File

@ -336,12 +336,11 @@ static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
static unsigned long __gmap_segment_gaddr(unsigned long *entry)
{
struct page *page;
unsigned long offset, mask;
unsigned long offset;
offset = (unsigned long) entry / sizeof(unsigned long);
offset = (offset & (PTRS_PER_PMD - 1)) * PMD_SIZE;
mask = ~(PTRS_PER_PMD * sizeof(pmd_t) - 1);
page = virt_to_page((void *)((unsigned long) entry & mask));
page = pmd_pgtable_page((pmd_t *) entry);
return page->index + offset;
}

2
include/linux/mm.h
View File

@ -2510,7 +2510,7 @@ static inline void pgtable_pte_page_dtor(struct page *page)
#if USE_SPLIT_PMD_PTLOCKS
static struct page *pmd_pgtable_page(pmd_t *pmd)
static inline struct page *pmd_pgtable_page(pmd_t *pmd)
{
unsigned long mask = ~(PTRS_PER_PMD * sizeof(pmd_t) - 1);
return virt_to_page((void *)((unsigned long) pmd & mask));