Patch "arm-ccn: perf: Prevent module unload while PMU is in use" has been added to the 3.18-stable tree

Patch "arm-ccn: perf: Prevent module unload while PMU is in use" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    arm-ccn: perf: Prevent module unload while PMU is in use

to the 3.18-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:
     arm-ccn-perf-prevent-module-unload-while-pmu-is-in-use.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Dec 18 15:03:25 CET 2017
From: Suzuki K Poulose <suzuki.poulose@arm.com>
Date: Fri, 3 Nov 2017 11:45:18 +0000
Subject: arm-ccn: perf: Prevent module unload while PMU is in use

From: Suzuki K Poulose <suzuki.poulose@arm.com>


[ Upstream commit c7f5828bf77dcbd61d51f4736c1d5aa35663fbb4 ]

When the PMU driver is built as a module, the perf expects the
pmu->module to be valid, so that the driver is prevented from
being unloaded while it is in use. Fix the CCN pmu driver to
fill in this field.

Fixes: a33b0daab73a0 ("bus: ARM CCN PMU driver")
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/bus/arm-ccn.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/bus/arm-ccn.c
+++ b/drivers/bus/arm-ccn.c
@@ -1157,6 +1157,7 @@ static int arm_ccn_pmu_init(struct arm_c
 
 	/* Perf driver registration */
 	ccn->dt.pmu = (struct pmu) {
+		.module = THIS_MODULE,
 		.attr_groups = arm_ccn_pmu_attr_groups,
 		.task_ctx_nr = perf_invalid_context,
 		.event_init = arm_ccn_pmu_event_init,


Patches currently in stable-queue which might be from suzuki.poulose@arm.com are

queue-3.18/arm-ccn-perf-prevent-module-unload-while-pmu-is-in-use.patch