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mm/z3fold: remove unused function handle_to_z3fold_header()

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handle_to_z3fold_header() is unused now.  So we can remove it.  As a
result, get_z3fold_header() becomes the only caller of
__get_z3fold_header() and the argument lock is always true.  Therefore we
could further fold the __get_z3fold_header() into get_z3fold_header() with
lock = true.

Link: https://lkml.kernel.org/r/20210619093151.1492174-5-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com>
Cc: Hillf Danton <hdanton@sina.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
2021-06-30 18:50:33 -07:00
committed by Linus Torvalds
parent e891f60e28
commit 767cc6c556
1 changed files with 4 additions and 18 deletions
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22
mm/z3fold.c
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@@ -253,9 +253,8 @@ static inline void z3fold_page_unlock(struct z3fold_header *zhdr)
spin_unlock(&zhdr->page_lock); spin_unlock(&zhdr->page_lock);
} }
/* return locked z3fold page if it's not headless */
static inline struct z3fold_header *__get_z3fold_header(unsigned long handle, static inline struct z3fold_header *get_z3fold_header(unsigned long handle)
bool lock)
{ {
struct z3fold_buddy_slots *slots; struct z3fold_buddy_slots *slots;
struct z3fold_header *zhdr; struct z3fold_header *zhdr;
@@ -269,13 +268,12 @@ static inline struct z3fold_header *__get_z3fold_header(unsigned long handle,
read_lock(&slots->lock); read_lock(&slots->lock);
addr = *(unsigned long *)handle; addr = *(unsigned long *)handle;
zhdr = (struct z3fold_header *)(addr & PAGE_MASK); zhdr = (struct z3fold_header *)(addr & PAGE_MASK);
if (lock) locked = z3fold_page_trylock(zhdr);
locked = z3fold_page_trylock(zhdr);
read_unlock(&slots->lock); read_unlock(&slots->lock);
if (locked) if (locked)
break; break;
cpu_relax(); cpu_relax();
} while (lock); } while (true);
} else { } else {
zhdr = (struct z3fold_header *)(handle & PAGE_MASK); zhdr = (struct z3fold_header *)(handle & PAGE_MASK);
} }
@@ -283,18 +281,6 @@ static inline struct z3fold_header *__get_z3fold_header(unsigned long handle,
return zhdr; return zhdr;
} }
/* Returns the z3fold page where a given handle is stored */
static inline struct z3fold_header *handle_to_z3fold_header(unsigned long h)
{
return __get_z3fold_header(h, false);
}
/* return locked z3fold page if it's not headless */
static inline struct z3fold_header *get_z3fold_header(unsigned long h)
{
return __get_z3fold_header(h, true);
}
static inline void put_z3fold_header(struct z3fold_header *zhdr) static inline void put_z3fold_header(struct z3fold_header *zhdr)
{ {
struct page *page = virt_to_page(zhdr); struct page *page = virt_to_page(zhdr);