Please queue up the following Sparc bug fix for 3.14, 3.18, and 4.0 -stable, respectively. Thanks!
>From patchwork Tue Apr 21 14:30:41 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit 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 [ 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> --- arch/sparc/kernel/ldc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c index d2ae0f7..7d3ca30 100644 --- a/arch/sparc/kernel/ldc.c +++ b/arch/sparc/kernel/ldc.c @@ -2290,7 +2290,7 @@ void *ldc_alloc_exp_dring(struct ldc_channel *lp, unsigned int len, if (len & (8UL - 1)) return ERR_PTR(-EINVAL); - buf = kzalloc(len, GFP_KERNEL); + buf = kzalloc(len, GFP_ATOMIC); if (!buf) return ERR_PTR(-ENOMEM);