libpfm4: Upgrade to 4.11.0

Add a patch to fix compiler error with latest clang compiler

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-kernel/libpfm/libpfm4/0002-perf_examples-Remove-unused-sum-variable.patch

@@ -0,0 +1,44 @@
+From 0b2f611a95f3c93454453892bbe021ad2815925d Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Tue, 15 Jun 2021 17:35:26 -0700
+Subject: [PATCH] perf_examples: Remove unused 'sum' variable
+
+Fixes
+self_smpl_multi.c:144:19: error: variable 'sum' set but not used [-Werror,-Wunused-but-set-variable]
+        unsigned long x, sum;
+                         ^
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ perf_examples/self_smpl_multi.c | 5 +----
+ 1 file changed, 1 insertion(+), 4 deletions(-)
+
+diff --git a/perf_examples/self_smpl_multi.c b/perf_examples/self_smpl_multi.c
+index 391fa61..75b45e0 100644
+--- a/perf_examples/self_smpl_multi.c
++++ b/perf_examples/self_smpl_multi.c
+@@ -141,7 +141,7 @@ void
+ do_cycles(void)
+ {
+ 	struct timeval start, last, now;
+-	unsigned long x, sum;
++	unsigned long x;
+ 
+ 	gettimeofday(&start, NULL);
+ 	last = start;
+@@ -150,15 +150,12 @@ do_cycles(void)
+ 	iter[myid] = 0;
+ 
+ 	do {
+-
+-		sum = 1;
+ 		for (x = 1; x < 250000; x++) {
+ 			/* signal pending to private queue because of
+ 			 * pthread_kill(), i.e., tkill()
+ 			 */
+ 			if ((x % 5000) == 0)
+ 				pthread_kill(pthread_self(), SIGUSR1);
+-			sum += x;
+ 		}
+ 		iter[myid]++;
+ 

meta-oe/recipes-kernel/libpfm/libpfm4_4.11.0.bb

@@ -14,9 +14,9 @@ COMPATIBLE_HOST = "powerpc64"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/perfmon2/${BPN}/libpfm-${PV}.tar.gz \
            file://0001-Include-poll.h-instead-of-sys-poll.h.patch \
-          "
+           file://0002-perf_examples-Remove-unused-sum-variable.patch \
-SRC_URI[md5sum] = "d8f66cb9bfa7e1434434e0de6409db5b"
+           "
-SRC_URI[sha256sum] = "c61c575378b5c17ccfc5806761e4038828610de76e2e34fac9f7fa73ba844b49"
+SRC_URI[sha256sum] = "5da5f8872bde14b3634c9688d980f68bda28b510268723cc12973eedbab9fecc"
 
 UPSTREAM_CHECK_URI = "http://sourceforge.net/projects/perfmon2/files/libpfm4/"