The patch titled
Subject: proc: test /proc/self/wchan
has been added to the -mm tree. Its filename is
proc-test-proc-self-wchan.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/proc-test-proc-self-wchan.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/proc-test-proc-self-wchan.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: proc: test /proc/self/wchan
This patch starts testing /proc. Many more tests to come (I promise).
Read from /proc/self/wchan should always return "0" as
current is in TASK_RUNNING state while reading /proc/self/wchan.
Link: http://lkml.kernel.org/r/20180226212006.GA742@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/Makefile | 1
tools/testing/selftests/proc/.gitignore | 1
tools/testing/selftests/proc/Makefile | 6 +++
tools/testing/selftests/proc/config | 1
tools/testing/selftests/proc/proc-self-wchan.c | 25 +++++++++++++++
5 files changed, 34 insertions(+)
diff -puN tools/testing/selftests/Makefile~proc-test-proc-self-wchan tools/testing/selftests/Makefile
--- a/tools/testing/selftests/Makefile~proc-test-proc-self-wchan
+++ a/tools/testing/selftests/Makefile
@@ -23,6 +23,7 @@ TARGETS += mqueue
TARGETS += net
TARGETS += nsfs
TARGETS += powerpc
+TARGETS += proc
TARGETS += pstore
TARGETS += ptrace
TARGETS += seccomp
diff -puN /dev/null tools/testing/selftests/proc/config
--- /dev/null
+++ a/tools/testing/selftests/proc/config
@@ -0,0 +1 @@
+CONFIG_PROC_FS=y
diff -puN /dev/null tools/testing/selftests/proc/.gitignore
--- /dev/null
+++ a/tools/testing/selftests/proc/.gitignore
@@ -0,0 +1 @@
+/proc-self-wchan
diff -puN /dev/null tools/testing/selftests/proc/Makefile
--- /dev/null
+++ a/tools/testing/selftests/proc/Makefile
@@ -0,0 +1,6 @@
+CFLAGS += -Wall -O2
+
+TEST_GEN_PROGS :=
+TEST_GEN_PROGS += proc-self-wchan
+
+include ../lib.mk
diff -puN /dev/null tools/testing/selftests/proc/proc-self-wchan.c
--- /dev/null
+++ a/tools/testing/selftests/proc/proc-self-wchan.c
@@ -0,0 +1,25 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+
+int main(void)
+{
+ char buf[64];
+ int fd;
+
+ fd = open("/proc/self/wchan", O_RDONLY);
+ if (fd == -1) {
+ if (errno == ENOENT)
+ return 2;
+ return 1;
+ }
+
+ buf[0] = '\0';
+ if (read(fd, buf, sizeof(buf)) != 1)
+ return 1;
+ if (buf[0] != '0')
+ return 1;
+ return 0;
+}
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
proc-do-less-stuff-under-pde_unload_lock.patch
proc-move-proc-sysvipc-creation-to-where-it-belongs.patch
proc-faster-open-close-of-files-without-release-hook.patch
proc-randomize-struct-pde_opener.patch
proc-move-struct-pde_opener-to-kmem-cache.patch
proc-account-struct-pde_opener.patch
proc-check-permissions-earlier-for-proc-wchan.patch
proc-use-set_puts-at-proc-wchan.patch
proc-test-proc-self-wchan.patch
proc-test-proc-self-syscall.patch
uts-create-struct-uts_namespace-from-kmem_cache.patch
seq_file-delete-small-value-optimization.patch
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