[PATCH 3/8] hugetlb: rename remove_huge_page to hugetlb_delete_from_page_cache

Mike Kravetz
2022-08-24T17:59:19Z

remove_huge_page removes a hugetlb page from the page cache. Change
to hugetlb_delete_from_page_cache as it is a more descriptive name.
huge_add_to_page_cache is global in scope, but only deals with hugetlb
pages. For consistency and clarity, rename to hugetlb_add_to_page_cache.

Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
---
fs/hugetlbfs/inode.c | 21 ++++++++++-----------
include/linux/hugetlb.h | 2 +-
mm/hugetlb.c | 8 ++++----
3 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index dfb735a91bbb..d98c6edbd1a4 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -364,7 +364,7 @@ static int hugetlbfs_write_end(struct file *file, struct address_space *mapping,
return -EINVAL;
}

-static void remove_huge_page(struct page *page)
+static void hugetlb_delete_from_page_cache(struct page *page)
{
ClearPageDirty(page);
ClearPageUptodate(page);
@@ -478,15 +478,14 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart,
folio_lock(folio);
/*
* We must free the huge page and remove from page
- * cache (remove_huge_page) BEFORE removing the
- * region/reserve map (hugetlb_unreserve_pages). In
- * rare out of memory conditions, removal of the
- * region/reserve map could fail. Correspondingly,
- * the subpool and global reserve usage count can need
- * to be adjusted.
+ * cache BEFORE removing the * region/reserve map
+ * (hugetlb_unreserve_pages). In rare out of memory
+ * conditions, removal of the region/reserve map could
+ * fail. Correspondingly, the subpool and global
+ * reserve usage count can need to be adjusted.
*/
VM_BUG_ON(HPageRestoreReserve(&folio->page));
- remove_huge_page(&folio->page);
+ hugetlb_delete_from_page_cache(&folio->page);
freed++;
if (!truncate_op) {
if (unlikely(hugetlb_unreserve_pages(inode,
@@ -723,7 +722,7 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
}
clear_huge_page(page, addr, pages_per_huge_page(h));
__SetPageUptodate(page);
- error = huge_add_to_page_cache(page, mapping, index);
+ error = hugetlb_add_to_page_cache(page, mapping, index);
if (unlikely(error)) {
restore_reserve_on_error(h, &pseudo_vma, addr, page);
put_page(page);
@@ -735,7 +734,7 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,

SetHPageMigratable(page);
/*
- * unlock_page because locked by huge_add_to_page_cache()
+ * unlock_page because locked by hugetlb_add_to_page_cache()
* put_page() due to reference from alloc_huge_page()
*/
unlock_page(page);
@@ -980,7 +979,7 @@ static int hugetlbfs_error_remove_page(struct address_space *mapping,
struct inode *inode = mapping->host;
pgoff_t index = page->index;

- remove_huge_page(page);
+ hugetlb_delete_from_page_cache(page);
if (unlikely(hugetlb_unreserve_pages(inode, index, index + 1, 1)))
hugetlb_fix_reserve_counts(inode);

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 3ec981a0d8b3..acace1a25226 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -665,7 +665,7 @@ struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
nodemask_t *nmask, gfp_t gfp_mask);
struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
unsigned long address);
-int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
+int hugetlb_add_to_page_cache(struct page *page, struct address_space *mapping,
pgoff_t idx);
void restore_reserve_on_error(struct hstate *h, struct vm_area_struct *vma,
unsigned long address, struct page *page);
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 95c6f9a5bbf0..11c02513588c 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5445,7 +5445,7 @@ static bool hugetlbfs_pagecache_present(struct hstate *h,
return page != NULL;
}

-int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
+int hugetlb_add_to_page_cache(struct page *page, struct address_space *mapping,
pgoff_t idx)
{
struct folio *folio = page_folio(page);
@@ -5586,7 +5586,7 @@ static vm_fault_t hugetlb_no_page(struct mm_struct *mm,
new_page = true;

if (vma->vm_flags & VM_MAYSHARE) {
- int err = huge_add_to_page_cache(page, mapping, idx);
+ int err = hugetlb_add_to_page_cache(page, mapping, idx);
if (err) {
restore_reserve_on_error(h, vma, haddr, page);
put_page(page);
@@ -5993,11 +5993,11 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,

/*
* Serialization between remove_inode_hugepages() and
- * huge_add_to_page_cache() below happens through the
+ * hugetlb_add_to_page_cache() below happens through the
* hugetlb_fault_mutex_table that here must be hold by
* the caller.
*/
- ret = huge_add_to_page_cache(page, mapping, idx);
+ ret = hugetlb_add_to_page_cache(page, mapping, idx);
if (ret)
goto out_release_nounlock;
page_in_pagecache = true;
--
2.37.1