+ proc-fixup-uptime-test.patch added to mm-nonmm-unstable branch

+ proc-fixup-uptime-test.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: proc: fixup uptime selftest
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     proc-fixup-uptime-test.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/proc-fixup-uptime-test.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
From: Alexey Dobriyan <adobriyan@gmail.com>
Subject: proc: fixup uptime selftest
Date: Mon, 24 Oct 2022 21:08:09 +0300

syscall(3) returns -1 and sets errno on error, unlike "syscall"
instruction.

Systems which have <= 32/64 CPUs are unaffected. Test won't bounce
to all CPUs before completing if there are more of them.

Link: https://lkml.kernel.org/r/Y1bUiT7VRXlXPQa1@p183
Fixes: 1f5bd0547654 ("proc: selftests: test /proc/uptime")
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/proc/proc-uptime-002.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/proc/proc-uptime-002.c~proc-fixup-uptime-test
+++ a/tools/testing/selftests/proc/proc-uptime-002.c
@@ -17,6 +17,7 @@
 // while shifting across CPUs.
 #undef NDEBUG
 #include <assert.h>
+#include <errno.h>
 #include <unistd.h>
 #include <sys/syscall.h>
 #include <stdlib.h>
@@ -54,7 +55,7 @@ int main(void)
 		len += sizeof(unsigned long);
 		free(m);
 		m = malloc(len);
-	} while (sys_sched_getaffinity(0, len, m) == -EINVAL);
+	} while (sys_sched_getaffinity(0, len, m) == -1 && errno == EINVAL);
 
 	fd = open("/proc/uptime", O_RDONLY);
 	assert(fd >= 0);
_

Patches currently in -mm which might be from adobriyan@gmail.com are

proc-give-proc-cmdline-size.patch
proc-fixup-uptime-test.patch