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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, kernel test robot <lkp@intel.com>,
	"Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>,
	Steven Rostedt <rostedt@goodmis.org>
Subject: [PATCH 4.19 02/21] tracing: Tag trace_percpu_buffer as a percpu pointer
Date: Mon, 10 Jan 2022 08:23:03 +0100	[thread overview]
Message-ID: <20220110071814.047265306@linuxfoundation.org> (raw)
In-Reply-To: <20220110071813.967414697@linuxfoundation.org>

From: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>

commit f28439db470cca8b6b082239314e9fd10bd39034 upstream.

Tag trace_percpu_buffer as a percpu pointer to resolve warnings
reported by sparse:
  /linux/kernel/trace/trace.c:3218:46: warning: incorrect type in initializer (different address spaces)
  /linux/kernel/trace/trace.c:3218:46:    expected void const [noderef] __percpu *__vpp_verify
  /linux/kernel/trace/trace.c:3218:46:    got struct trace_buffer_struct *
  /linux/kernel/trace/trace.c:3234:9: warning: incorrect type in initializer (different address spaces)
  /linux/kernel/trace/trace.c:3234:9:    expected void const [noderef] __percpu *__vpp_verify
  /linux/kernel/trace/trace.c:3234:9:    got int *

Link: https://lkml.kernel.org/r/ebabd3f23101d89cb75671b68b6f819f5edc830b.1640255304.git.naveen.n.rao@linux.vnet.ibm.com

Cc: stable@vger.kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 07d777fe8c398 ("tracing: Add percpu buffers for trace_printk()")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 kernel/trace/trace.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2812,7 +2812,7 @@ struct trace_buffer_struct {
 	char buffer[4][TRACE_BUF_SIZE];
 };
 
-static struct trace_buffer_struct *trace_percpu_buffer;
+static struct trace_buffer_struct __percpu *trace_percpu_buffer;
 
 /*
  * Thise allows for lockless recording.  If we're nested too deeply, then
@@ -2841,7 +2841,7 @@ static void put_trace_buf(void)
 
 static int alloc_percpu_trace_buffer(void)
 {
-	struct trace_buffer_struct *buffers;
+	struct trace_buffer_struct __percpu *buffers;
 
 	buffers = alloc_percpu(struct trace_buffer_struct);
 	if (WARN(!buffers, "Could not allocate percpu trace_printk buffer"))



  parent reply	other threads:[~2022-01-10  7:32 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-10  7:23 [PATCH 4.19 00/21] 4.19.225-rc1 review Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 01/21] tracing: Fix check for trace_percpu_buffer validity in get_trace_buf() Greg Kroah-Hartman
2022-01-10  7:23 ` Greg Kroah-Hartman [this message]
2022-01-10  7:23 ` [PATCH 4.19 03/21] ieee802154: atusb: fix uninit value in atusb_set_extended_addr Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 04/21] RDMA/core: Dont infoleak GRH fields Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 05/21] mac80211: initialize variable have_higher_than_11mbit Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 06/21] i40e: fix use-after-free in i40e_sync_filters_subtask() Greg Kroah-Hartman
2022-01-10 10:10   ` Pavel Machek
2022-01-10  7:23 ` [PATCH 4.19 07/21] i40e: Fix incorrect netdevs real number of RX/TX queues Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 08/21] ipv6: Check attribute length for RTA_GATEWAY in multipath route Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 09/21] ipv6: Check attribute length for RTA_GATEWAY when deleting " Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 10/21] sch_qfq: prevent shift-out-of-bounds in qfq_init_qdisc Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 11/21] xfs: map unwritten blocks in XFS_IOC_{ALLOC,FREE}SP just like fallocate Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 12/21] power: reset: ltc2952: Fix use of floating point literals Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 13/21] rndis_host: support Hytera digital radios Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 14/21] phonet: refcount leak in pep_sock_accep Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 15/21] ipv6: Continue processing multipath route even if gateway attribute is invalid Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 16/21] ipv6: Do cleanup if attribute validation fails in multipath route Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 17/21] usb: mtu3: fix interval value for intr and isoc Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 18/21] scsi: libiscsi: Fix UAF in iscsi_conn_get_param()/iscsi_conn_teardown() Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 19/21] ip6_vti: initialize __ip6_tnl_parm struct in vti6_siocdevprivate Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 20/21] net: udp: fix alignment problem in udp4_seq_show() Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 21/21] mISDN: change function names to avoid conflicts Greg Kroah-Hartman
2022-01-10 11:49 ` [PATCH 4.19 00/21] 4.19.225-rc1 review Jon Hunter
2022-01-10 22:59 ` Shuah Khan
2022-01-10 23:49 ` Guenter Roeck
2022-01-11  0:49 ` Samuel Zou
2022-01-11  5:53 ` Naresh Kamboju
2022-01-11 11:35 ` Pavel Machek
2022-01-11 12:35 ` Sudip Mukherjee

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