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Code Issues Releases Wiki Activity

mm: remove unneeded local variable follflags 

We can pass FOLL_GET | FOLL_DUMP to follow_page directly to simplify the
code a bit in add_page_for_migration and split_huge_pages_pid.

Link: https://lkml.kernel.org/r/20220311072002.35575-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-03-22 14:45:29 -07:00 committed by Linus Torvalds
parent 4e936ecc01
commit 87d2762e22
2 changed files with 2 additions and 6 deletions
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4
mm/huge_memory.c
View File

@ -2953,7 +2953,6 @@ static int split_huge_pages_pid(int pid, unsigned long vaddr_start,
*/
for (addr = vaddr_start; addr < vaddr_end; addr += PAGE_SIZE) {
struct vm_area_struct *vma = find_vma(mm, addr);
unsigned int follflags;
struct page *page;
if (!vma || addr < vma->vm_start)
@ -2966,8 +2965,7 @@ static int split_huge_pages_pid(int pid, unsigned long vaddr_start,
}
/* FOLL_DUMP to ignore special (like zero) pages */
follflags = FOLL_GET | FOLL_DUMP;
page = follow_page(vma, addr, follflags);
page = follow_page(vma, addr, FOLL_GET | FOLL_DUMP);
if (IS_ERR(page))
continue;

4
mm/migrate.c
View File

@ -1611,7 +1611,6 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr,
{
struct vm_area_struct *vma;
struct page *page;
unsigned int follflags;
int err;
mmap_read_lock(mm);
@ -1621,8 +1620,7 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr,
goto out;
/* FOLL_DUMP to ignore special (like zero) pages */
follflags = FOLL_GET | FOLL_DUMP;
page = follow_page(vma, addr, follflags);
page = follow_page(vma, addr, FOLL_GET | FOLL_DUMP);
err = PTR_ERR(page);
if (IS_ERR(page))