diff options
| author | ZhangPeng <zhangpeng362@huawei.com> | 2023-04-10 21:39:29 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-04-18 16:29:55 -0700 |
| commit | e87340ca5c9cecc8a11daf1a2dcabf23f06a4e10 (patch) | |
| tree | 272bba76d4f3f24438200f33484746486161e75c /mm/memory.c | |
| parent | 0d508c1f0e2c7cec76c141e9d2ebc3020d9e4be4 (diff) | |
| download | linux-next-e87340ca5c9cecc8a11daf1a2dcabf23f06a4e10.tar.gz | |
userfaultfd: convert copy_huge_page_from_user() to copy_folio_from_user()
Replace copy_huge_page_from_user() with copy_folio_from_user().
copy_folio_from_user() does the same as copy_huge_page_from_user(), but
takes in a folio instead of a page.
Convert page_kaddr to kaddr in copy_folio_from_user() to do indenting
cleanup.
Link: https://lkml.kernel.org/r/20230410133932.32288-4-zhangpeng362@huawei.com
Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
Reviewed-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/mm/memory.c b/mm/memory.c index 808f354bce65..021cab989703 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -5868,26 +5868,25 @@ void copy_user_huge_page(struct page *dst, struct page *src, process_huge_page(addr_hint, pages_per_huge_page, copy_subpage, &arg); } -long copy_huge_page_from_user(struct page *dst_page, - const void __user *usr_src, - unsigned int pages_per_huge_page, - bool allow_pagefault) +long copy_folio_from_user(struct folio *dst_folio, + const void __user *usr_src, + bool allow_pagefault) { - void *page_kaddr; + void *kaddr; unsigned long i, rc = 0; - unsigned long ret_val = pages_per_huge_page * PAGE_SIZE; + unsigned int nr_pages = folio_nr_pages(dst_folio); + unsigned long ret_val = nr_pages * PAGE_SIZE; struct page *subpage; - for (i = 0; i < pages_per_huge_page; i++) { - subpage = nth_page(dst_page, i); - page_kaddr = kmap_local_page(subpage); + for (i = 0; i < nr_pages; i++) { + subpage = folio_page(dst_folio, i); + kaddr = kmap_local_page(subpage); if (!allow_pagefault) pagefault_disable(); - rc = copy_from_user(page_kaddr, - usr_src + i * PAGE_SIZE, PAGE_SIZE); + rc = copy_from_user(kaddr, usr_src + i * PAGE_SIZE, PAGE_SIZE); if (!allow_pagefault) pagefault_enable(); - kunmap_local(page_kaddr); + kunmap_local(kaddr); ret_val -= (PAGE_SIZE - rc); if (rc) |