On 06/15/2017 05:01 PM, Andrew Morton wrote:
> On Thu, 15 Jun 2017 16:51:41 -0500 Goldwyn Rodrigues <[email protected]> wrote:
>
>>> I have only minor quibbles - I'll grab the patch series for some -next
>>> testing (at least).
>>>
>>
>> I agree to the quibbles you have on patch 02/10. Should I send the
>> entire fixed series, just the 02/10 patch, or would you prefer to fix it?
>
> This?
Perfect. Thanks!
>
> --- a/include/linux/fs.h~fs-introduce-filemap_range_has_page-fix
> +++ a/include/linux/fs.h
> @@ -2517,8 +2517,8 @@ extern int filemap_fdatawait(struct addr
> extern void filemap_fdatawait_keep_errors(struct address_space *);
> extern int filemap_fdatawait_range(struct address_space *, loff_t lstart,
> loff_t lend);
> -extern int filemap_range_has_page(struct address_space *, loff_t lstart,
> - loff_t lend);
> +extern bool filemap_range_has_page(struct address_space *, loff_t lstart,
> + loff_t lend);
> extern int filemap_write_and_wait(struct address_space *mapping);
> extern int filemap_write_and_wait_range(struct address_space *mapping,
> loff_t lstart, loff_t lend);
> diff -puN mm/filemap.c~fs-introduce-filemap_range_has_page-fix mm/filemap.c
> --- a/mm/filemap.c~fs-introduce-filemap_range_has_page-fix
> +++ a/mm/filemap.c
> @@ -378,31 +378,30 @@ EXPORT_SYMBOL(filemap_flush);
>
> /**
> * filemap_range_has_page - check if a page exists in range.
> - * @mapping: address space structure to wait for
> + * @mapping: address space within which to check
> * @start_byte: offset in bytes where the range starts
> * @end_byte: offset in bytes where the range ends (inclusive)
> *
> * Find at least one page in the range supplied, usually used to check if
> * direct writing in this range will trigger a writeback.
> */
> -int filemap_range_has_page(struct address_space *mapping,
> - loff_t start_byte, loff_t end_byte)
> +bool filemap_range_has_page(struct address_space *mapping,
> + loff_t start_byte, loff_t end_byte)
> {
> pgoff_t index = start_byte >> PAGE_SHIFT;
> pgoff_t end = end_byte >> PAGE_SHIFT;
> struct pagevec pvec;
> - int ret;
> + bool ret;
>
> if (end_byte < start_byte)
> - return 0;
> + return false;
>
> if (mapping->nrpages == 0)
> - return 0;
> + return false;
>
> pagevec_init(&pvec, 0);
> - ret = pagevec_lookup(&pvec, mapping, index, 1);
> - if (!ret)
> - return 0;
> + if (!pagevec_lookup(&pvec, mapping, index, 1))
> + return false;
> ret = (pvec.pages[0]->index <= end);
> pagevec_release(&pvec);
> return ret;
> _
>
--
Goldwyn
