Fixes for 4.9

Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/queue-4.9/gcov-add-support-for-gcc-10.1.patch b/queue-4.9/gcov-add-support-for-gcc-10.1.patch
new file mode 100644 (file)
index 0000000..e88695a
--- /dev/null
+++ b/queue-4.9/gcov-add-support-for-gcc-10.1.patch
@@ -0,0 +1,60 @@
+From 828f853e271fdd22e26dc531988f7cb5ddefae05 Mon Sep 17 00:00:00 2001
+From: Sasha Levin <sashal@kernel.org>
+Date: Thu, 10 Sep 2020 14:52:01 +0200
+Subject: gcov: add support for GCC 10.1
+
+From: Peter Oberparleiter <oberpar@linux.ibm.com>
+
+[ Upstream commit 40249c6962075c040fd071339acae524f18bfac9 ]
+
+Using gcov to collect coverage data for kernels compiled with GCC 10.1
+causes random malfunctions and kernel crashes.  This is the result of a
+changed GCOV_COUNTERS value in GCC 10.1 that causes a mismatch between
+the layout of the gcov_info structure created by GCC profiling code and
+the related structure used by the kernel.
+
+Fix this by updating the in-kernel GCOV_COUNTERS value.  Also re-enable
+config GCOV_KERNEL for use with GCC 10.
+
+Reported-by: Colin Ian King <colin.king@canonical.com>
+Reported-by: Leon Romanovsky <leonro@nvidia.com>
+Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
+Tested-by: Leon Romanovsky <leonro@nvidia.com>
+Tested-and-Acked-by: Colin Ian King <colin.king@canonical.com>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+---
+ kernel/gcov/Kconfig   | 1 -
+ kernel/gcov/gcc_4_7.c | 4 +++-
+ 2 files changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig
+index 1d78ed19a3512..1276aabaab550 100644
+--- a/kernel/gcov/Kconfig
++++ b/kernel/gcov/Kconfig
+@@ -3,7 +3,6 @@ menu "GCOV-based kernel profiling"
+ config GCOV_KERNEL
+       bool "Enable gcov-based kernel profiling"
+       depends on DEBUG_FS
+-      depends on !CC_IS_GCC || GCC_VERSION < 100000
+       select CONSTRUCTORS if !UML
+       default n
+       ---help---
+diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c
+index 46a18e72bce61..6d5ef6220afe7 100644
+--- a/kernel/gcov/gcc_4_7.c
++++ b/kernel/gcov/gcc_4_7.c
+@@ -18,7 +18,9 @@
+ #include <linux/vmalloc.h>
+ #include "gcov.h"
+ 
+-#if (__GNUC__ >= 7)
++#if (__GNUC__ >= 10)
++#define GCOV_COUNTERS                 8
++#elif (__GNUC__ >= 7)
+ #define GCOV_COUNTERS                 9
+ #elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
+ #define GCOV_COUNTERS                 10
+-- 
+2.25.1
+

diff --git a/queue-4.9/series b/queue-4.9/series
index 96dbd0b275309f58db7550694fdfbaf05df2f7a5..7d70b143e50bfb208d55c63e8558520e481a5f0a 100644 (file)
--- a/queue-4.9/series
+++ b/queue-4.9/series
@@ -44,3 +44,4 @@ usb-serial-option-add-support-for-sim7070-sim7080-sim7090-modules.patch
 usb-fix-out-of-sync-data-toggle-if-a-configured-device-is-reconfigured.patch
 ib-rxe-remove-a-pointless-indirection-layer.patch
 rdma-rxe-fix-the-parent-sysfs-read-when-the-interfac.patch
+gcov-add-support-for-gcc-10.1.patch