xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

treewide: convert PF_MEMALLOC manipulations to new helpers

Browse Source 
We now have memalloc_noreclaim_{save,restore} helpers for robust setting
and clearing of PF_MEMALLOC.  Let's convert the code which was using the
generic tsk_restore_flags().  No functional change.

[vbabka@suse.cz: in net/core/sock.c the hunk is missing]
Link: http://lkml.kernel.org/r/20170405074700.29871-4-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Josef Bacik <jbacik@fb.com>
Cc: Lee Duncan <lduncan@suse.com>
Cc: Chris Leech <cleech@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Wouter Verhelst <w@uter.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vlastimil Babka
2017-05-08 15:59:53 -07:00
committed by Linus Torvalds
parent 499118e966
commit f108304872
4 changed files with 16 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
net/core/dev.c
View File

@@ -81,6 +81,7 @@
#include <linux/hash.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/sched/mm.h>
#include <linux/mutex.h>
#include <linux/string.h>
#include <linux/mm.h>
@@ -4235,7 +4236,7 @@ static int __netif_receive_skb(struct sk_buff *skb)
int ret;
if (sk_memalloc_socks() && skb_pfmemalloc(skb)) {
unsigned long pflags = current->flags;
unsigned int noreclaim_flag;
/*
* PFMEMALLOC skbs are special, they should
@@ -4246,9 +4247,9 @@ static int __netif_receive_skb(struct sk_buff *skb)
* Use PF_MEMALLOC as this saves us from propagating the allocation
* context down to all allocation sites.
*/
current->flags |= PF_MEMALLOC;
noreclaim_flag = memalloc_noreclaim_save();
ret = __netif_receive_skb_core(skb, true);
current_restore_flags(pflags, PF_MEMALLOC);
memalloc_noreclaim_restore(noreclaim_flag);
} else
ret = __netif_receive_skb_core(skb, false);