> --- a/include/linux/page-flags.h
> +++ b/include/linux/page-flags.h
> @@ -269,7 +269,7 @@ static inline struct page *compound_head_fast(struct page *page)
> return page;
> }
>
> -TESTPAGEFLAG(Locked, locked, ANY)
> +__PAGEFLAG(Locked, locked, NO_TAIL)
> PAGEFLAG(Error, error, ANY) TESTCLEARFLAG(Error, error, ANY)
> PAGEFLAG(Referenced, referenced, ANY) TESTCLEARFLAG(Referenced, referenced, ANY)
> __SETPAGEFLAG(Referenced, referenced, ANY)
[...]
> @@ -490,9 +481,9 @@ extern int wait_on_page_bit_killable_timeout(struct page *page,
>
> static inline int wait_on_page_locked_killable(struct page *page)
> {
> - if (PageLocked(page))
> - return wait_on_page_bit_killable(page, PG_locked);
> - return 0;
> + if (!PageLocked(page))
> + return 0;
I am lost here: can we feed any page to NO_TAIL operation?
> + return wait_on_page_bit_killable(compound_head(page), PG_locked);
> }
>
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