* [PATCH] mm/filemap: introduce local helper for_each_folio
@ 2024-09-09 6:17 chensong_2000
2024-09-09 19:47 ` Matthew Wilcox
0 siblings, 1 reply; 2+ messages in thread
From: chensong_2000 @ 2024-09-09 6:17 UTC (permalink / raw)
To: willy, akpm; +Cc: linux-fsdevel, linux-mm, linux-kernel, Song Chen
From: Song Chen <chensong_2000@189.cn>
Introduce for_each_folio to iterate folios in xarray for code style
compliance and better readability.
Signed-off-by: Song Chen <chensong_2000@189.cn>
---
mm/filemap.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index d62150418b91..5386348acacd 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -62,6 +62,9 @@
#include "swap.h"
+#define for_each_folio(folio, xas, max) \
+ for (folio = xas_load(&xas); \
+ folio && xas.xa_index <= max; folio = xas_next(&xas))
/*
* Shared mappings implemented 30.11.1994. It's not fully working yet,
* though.
@@ -2170,8 +2173,7 @@ unsigned filemap_get_folios_contig(struct address_space *mapping,
rcu_read_lock();
- for (folio = xas_load(&xas); folio && xas.xa_index <= end;
- folio = xas_next(&xas)) {
+ for_each_folio(folio, xas, end) {
if (xas_retry(&xas, folio))
continue;
/*
@@ -2306,7 +2308,7 @@ static void filemap_get_read_batch(struct address_space *mapping,
struct folio *folio;
rcu_read_lock();
- for (folio = xas_load(&xas); folio; folio = xas_next(&xas)) {
+ for_each_folio(folio, xas, ULONG_MAX) {
if (xas_retry(&xas, folio))
continue;
if (xas.xa_index > max || xa_is_value(folio))
--
2.34.1
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] mm/filemap: introduce local helper for_each_folio
2024-09-09 6:17 [PATCH] mm/filemap: introduce local helper for_each_folio chensong_2000
@ 2024-09-09 19:47 ` Matthew Wilcox
0 siblings, 0 replies; 2+ messages in thread
From: Matthew Wilcox @ 2024-09-09 19:47 UTC (permalink / raw)
To: chensong_2000; +Cc: akpm, linux-fsdevel, linux-mm, linux-kernel
On Mon, Sep 09, 2024 at 02:17:35PM +0800, chensong_2000@189.cn wrote:
> From: Song Chen <chensong_2000@189.cn>
>
> Introduce for_each_folio to iterate folios in xarray for code style
> compliance and better readability.
I'm not sure this is really worth it.
> Signed-off-by: Song Chen <chensong_2000@189.cn>
> ---
> mm/filemap.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/mm/filemap.c b/mm/filemap.c
> index d62150418b91..5386348acacd 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -62,6 +62,9 @@
>
> #include "swap.h"
>
> +#define for_each_folio(folio, xas, max) \
> + for (folio = xas_load(&xas); \
> + folio && xas.xa_index <= max; folio = xas_next(&xas))
> /*
> * Shared mappings implemented 30.11.1994. It's not fully working yet,
> * though.
> @@ -2170,8 +2173,7 @@ unsigned filemap_get_folios_contig(struct address_space *mapping,
>
> rcu_read_lock();
>
> - for (folio = xas_load(&xas); folio && xas.xa_index <= end;
> - folio = xas_next(&xas)) {
> + for_each_folio(folio, xas, end) {
> if (xas_retry(&xas, folio))
> continue;
> /*
> @@ -2306,7 +2308,7 @@ static void filemap_get_read_batch(struct address_space *mapping,
> struct folio *folio;
>
> rcu_read_lock();
> - for (folio = xas_load(&xas); folio; folio = xas_next(&xas)) {
> + for_each_folio(folio, xas, ULONG_MAX) {
> if (xas_retry(&xas, folio))
> continue;
> if (xas.xa_index > max || xa_is_value(folio))
> --
> 2.34.1
>
>
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2024-09-09 19:47 ` Matthew Wilcox
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