lmbench: lat_fifo: Fix cleanup sequence

Files should be unlinked after all users exit. Otherwise we might experience
(w) read/write on pipe: No such file or directory

Signed-off-by: He Zhe <zhe.he@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-benchmark/lmbench/lmbench-3.0-a9/0001-lat_fifo-Fix-cleanup-sequence.patch

@@ -0,0 +1,42 @@
+From 78912c0ac5e090095a2f2bd6226e02cce949e72e Mon Sep 17 00:00:00 2001
+From: He Zhe <zhe.he@windriver.com>
+Date: Fri, 22 Jan 2021 10:03:38 +0000
+Subject: [PATCH] lat_fifo: Fix cleanup sequence
+
+Files should be unlinked after all users exit.
+
+Signed-off-by: He Zhe <zhe.he@windriver.com>
+---
+ src/lat_fifo.c | 12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/src/lat_fifo.c b/src/lat_fifo.c
+index c625161..85bb9d1 100644
+--- a/src/lat_fifo.c
++++ b/src/lat_fifo.c
+@@ -120,16 +120,16 @@ cleanup(iter_t iterations, void * cookie)
+ 
+ 	if (iterations) return;
+ 
+-	unlink(state->filename1);
+-	unlink(state->filename2);
+-	close(state->wr);
+-	close(state->rd);
+-
+ 	if (state->pid > 0) {
+-		kill(state->pid, 15);
++		kill(state->pid, SIGKILL);
+ 		waitpid(state->pid, NULL, 0);
+ 		state->pid = 0;
+ 	}
++
++	unlink(state->filename1);
++	unlink(state->filename2);
++	close(state->wr);
++	close(state->rd);
+ }
+ 
+ void 
+-- 
+2.29.2
+

meta-oe/recipes-benchmark/lmbench/lmbench_3.0-a9.bb

@@ -28,6 +28,7 @@ SRC_URI = "${SOURCEFORGE_MIRROR}/lmbench/lmbench-${PV}.tgz \
            file://0001-src-Makefile-use-libdir-instead-of-hardcoded-lib.patch \
            file://0001-lmbench-Point-webpage-lm-to-target-directory.patch \
            file://0001-doc-Fix-typos-in-manual-pages.patch \
+           file://0001-lat_fifo-Fix-cleanup-sequence.patch \
            "
 SRC_URI[md5sum] = "b3351a3294db66a72e2864a199d37cbf"
 SRC_URI[sha256sum] = "cbd5777d15f44eab7666dcac418054c3c09df99826961a397d9acf43d8a2a551"