This is a note to let you know that I've just added the patch titled
sparc: Use GFP_ATOMIC in ldc_alloc_exp_dring() as it can be called in
to the 4.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sparc-Use-GFP_ATOMIC-in-ldc_alloc_exp_dring-as-it-can-be-called-in-softirq-context.patch
and it can be found in the queue-4.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From patchwork Tue Apr 21 14:30:41 2015
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Subject: sparc: Use GFP_ATOMIC in ldc_alloc_exp_dring() as it can be called in
softirq context
From: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
X-Patchwork-Id: 463148
Message-Id: <1429626641-199974-1-git-send-email-sowmini.varadhan@xxxxxxxxxx>
To: sowmini.varadhan@xxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx
Cc: david.stevens@xxxxxxxxxx, davem@xxxxxxxxxxxxx
Date: Tue, 21 Apr 2015 10:30:41 -0400
From: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
Upstream commit 671d773297969bebb1732e1cdc1ec03aa53c6be2
Since it is possible for vnet_event_napi to end up doing
vnet_control_pkt_engine -> ... -> vnet_send_attr ->
vnet_port_alloc_tx_ring -> ldc_alloc_exp_dring -> kzalloc()
(i.e., in softirq context), kzalloc() should be called with
GFP_ATOMIC from ldc_alloc_exp_dring.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/sparc/kernel/ldc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -2313,7 +2313,7 @@ void *ldc_alloc_exp_dring(struct ldc_cha
if (len & (8UL - 1))
return ERR_PTR(-EINVAL);
- buf = kzalloc(len, GFP_KERNEL);
+ buf = kzalloc(len, GFP_ATOMIC);
if (!buf)
return ERR_PTR(-ENOMEM);
Patches currently in stable-queue which might be from sowmini.varadhan@xxxxxxxxxx are
queue-4.0/sparc-Use-GFP_ATOMIC-in-ldc_alloc_exp_dring-as-it-can-be-called-in-softirq-context.patch
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