lkml.org 
[lkml]   [2017]   [Mar]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Outreachy kernel] [PATCH 5/5] staging: lustre: osc_page.c: Use list_for_each_entry_safe


On Sun, 5 Mar 2017, SIMRAN SINGHAL wrote:

> On Sun, Mar 5, 2017 at 10:47 PM, Julia Lawall <julia.lawall@lip6.fr> wrote:
> > By the way, the above subject line is not correct. Normally one does not
> > put .c/.h in the subject line. Indeed, there is not really any
> > deterministic algorithm for choosing the subject line. You need to run
> > git log --oneline filename to see what others have done.
>
> So this would be fine Subject:-
> staging: lustre: osc_page: Use list_for_each_entry_safe

Looking at the result of git log --oneline, I would say:

staging: lustre: osc:

For example that it what is used by 86df598, which also only changes the
file modified by this patch.

julia

>
> >
> > julia
> >
> > On Sun, 5 Mar 2017, simran singhal wrote:
> >
> >> Doubly linked lists which are iterated using list_empty
> >> and list_entry macros have been replaced with list_for_each_entry_safe
> >> macro.
> >> This makes the iteration simpler and more readable.
> >>
> >> This patch replaces the while loop containing list_empty and list_entry
> >> with list_for_each_entry_safe.
> >>
> >> This was done with Coccinelle.
> >>
> >> @@
> >> expression E1;
> >> identifier I1, I2;
> >> type T;
> >> iterator name list_for_each_entry_safe;
> >> @@
> >>
> >> T *I1;
> >> + T *tmp;
> >> ...
> >> - while (list_empty(&E1) == 0)
> >> + list_for_each_entry_safe (I1, tmp, &E1, I2)
> >> {
> >> ...when != T *I1;
> >> - I1 = list_entry(E1.next, T, I2);
> >> ...
> >> }
> >>
> >> Signed-off-by: simran singhal <singhalsimran0@gmail.com>
> >> ---
> >> drivers/staging/lustre/lustre/osc/osc_page.c | 11 ++++-------
> >> 1 file changed, 4 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/drivers/staging/lustre/lustre/osc/osc_page.c b/drivers/staging/lustre/lustre/osc/osc_page.c
> >> index ed8a0dc..e8b974f 100644
> >> --- a/drivers/staging/lustre/lustre/osc/osc_page.c
> >> +++ b/drivers/staging/lustre/lustre/osc/osc_page.c
> >> @@ -542,6 +542,7 @@ long osc_lru_shrink(const struct lu_env *env, struct client_obd *cli,
> >> struct cl_object *clobj = NULL;
> >> struct cl_page **pvec;
> >> struct osc_page *opg;
> >> + struct osc_page *tmp;
> >> int maxscan = 0;
> >> long count = 0;
> >> int index = 0;
> >> @@ -572,7 +573,7 @@ long osc_lru_shrink(const struct lu_env *env, struct client_obd *cli,
> >> if (force)
> >> cli->cl_lru_reclaim++;
> >> maxscan = min(target << 1, atomic_long_read(&cli->cl_lru_in_list));
> >> - while (!list_empty(&cli->cl_lru_list)) {
> >> + list_for_each_entry_safe(opg, tmp, &cli->cl_lru_list, ops_lru) {
> >> struct cl_page *page;
> >> bool will_free = false;
> >>
> >> @@ -582,8 +583,6 @@ long osc_lru_shrink(const struct lu_env *env, struct client_obd *cli,
> >> if (--maxscan < 0)
> >> break;
> >>
> >> - opg = list_entry(cli->cl_lru_list.next, struct osc_page,
> >> - ops_lru);
> >> page = opg->ops_cl.cpl_page;
> >> if (lru_page_busy(cli, page)) {
> >> list_move_tail(&opg->ops_lru, &cli->cl_lru_list);
> >> @@ -1043,6 +1042,7 @@ unsigned long osc_cache_shrink_scan(struct shrinker *sk,
> >> {
> >> struct client_obd *stop_anchor = NULL;
> >> struct client_obd *cli;
> >> + struct client_obd *tmp;
> >> struct lu_env *env;
> >> long shrank = 0;
> >> u16 refcheck;
> >> @@ -1059,10 +1059,7 @@ unsigned long osc_cache_shrink_scan(struct shrinker *sk,
> >> return SHRINK_STOP;
> >>
> >> spin_lock(&osc_shrink_lock);
> >> - while (!list_empty(&osc_shrink_list)) {
> >> - cli = list_entry(osc_shrink_list.next, struct client_obd,
> >> - cl_shrink_list);
> >> -
> >> + list_for_each_entry_safe(cli, tmp, &osc_shrink_list, cl_shrink_list) {
> >> if (!stop_anchor)
> >> stop_anchor = cli;
> >> else if (cli == stop_anchor)
> >> --
> >> 2.7.4
> >>
> >> --
> >> You received this message because you are subscribed to the Google Groups "outreachy-kernel" group.
> >> To unsubscribe from this group and stop receiving emails from it, send an email to outreachy-kernel+unsubscribe@googlegroups.com.
> >> To post to this group, send email to outreachy-kernel@googlegroups.com.
> >> To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/1488733610-22289-6-git-send-email-singhalsimran0%40gmail.com.
> >> For more options, visit https://groups.google.com/d/optout.
> >>
>

\
 
 \ /
  Last update: 2017-03-05 18:49    [W:0.074 / U:1.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site