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 2/5] staging: lustre: ptlrpc: Use list_for_each_entry_safe


On Sun, 5 Mar 2017, SIMRAN SINGHAL wrote:

> On Sun, Mar 5, 2017 at 11:09 PM, Julia Lawall <julia.lawall@lip6.fr> wrote:
> >
> >
> > 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/ptlrpc/sec_gc.c | 5 ++---
> >> 1 file changed, 2 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_gc.c b/drivers/staging/lustre/lustre/ptlrpc/sec_gc.c
> >> index 8ffd000..fe1c0af 100644
> >> --- a/drivers/staging/lustre/lustre/ptlrpc/sec_gc.c
> >> +++ b/drivers/staging/lustre/lustre/ptlrpc/sec_gc.c
> >> @@ -98,12 +98,11 @@ void sptlrpc_gc_del_sec(struct ptlrpc_sec *sec)
> >> static void sec_process_ctx_list(void)
> >> {
> >> struct ptlrpc_cli_ctx *ctx;
> >> + struct ptlrpc_cli_ctx *tmp;
> >
> > Another improvement would be to define both variables at once:
> >
> > T *I1
> > + , *tmp
> > ;
> >
> This is particulary for this patch or for all the patches of this patch-series.

All, I would guess. Unless the line gets too long.

julia

>
> > julia
> >
> >>
> >> spin_lock(&sec_gc_ctx_list_lock);
> >>
> >> - while (!list_empty(&sec_gc_ctx_list)) {
> >> - ctx = list_entry(sec_gc_ctx_list.next,
> >> - struct ptlrpc_cli_ctx, cc_gc_chain);
> >> + list_for_each_entry_safe(ctx, tmp, &sec_gc_ctx_list, cc_gc_chain) {
> >> list_del_init(&ctx->cc_gc_chain);
> >> spin_unlock(&sec_gc_ctx_list_lock);
> >>
> >> --
> >> 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/1488733610-22289-3-git-send-email-singhalsimran0%40gmail.com.
> >> For more options, visit https://groups.google.com/d/optout.
> >>
>

\
 
 \ /
  Last update: 2017-03-05 18:43    [W:0.050 / U:0.424 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site