Delete a duplicate assignment from this function implementation.
The note means ppm is average of the two actual freq samples.
But ppm have a duplicate assignment.
Signed-off-by: Minjie Du <duminjie(a)vivo.com>
---
tools/testing/selftests/timers/raw_skew.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c
index 5beceeed0..6eba203f9 100644
--- a/tools/testing/selftests/timers/raw_skew.c
+++ b/tools/testing/selftests/timers/raw_skew.c
@@ -129,8 +129,7 @@ int main(int argc, char **argv)
printf("%lld.%i(est)", eppm/1000, abs((int)(eppm%1000)));
/* Avg the two actual freq samples adjtimex gave us */
- ppm = (tx1.freq + tx2.freq) * 1000 / 2;
- ppm = (long long)tx1.freq * 1000;
+ ppm = (long long)(tx1.freq + tx2.freq) * 1000 / 2;
ppm = shift_right(ppm, 16);
printf(" %lld.%i(act)", ppm/1000, abs((int)(ppm%1000)));
--
2.39.0
From: Jeff Xu <jeffxu(a)google.com>
Add documentation for sysctl vm.memfd_noexec
Link:https://lore.kernel.org/linux-mm/CABi2SkXUX_QqTQ10Yx9bBUGpN1wByOi_=gZU…
Reported-by: Dominique Martinet <asmadeus(a)codewreck.org>
Signed-off-by: Jeff Xu <jeffxu(a)google.com>
---
Documentation/admin-guide/sysctl/vm.rst | 29 +++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst
index 45ba1f4dc004..71923c3d7044 100644
--- a/Documentation/admin-guide/sysctl/vm.rst
+++ b/Documentation/admin-guide/sysctl/vm.rst
@@ -424,6 +424,35 @@ e.g., up to one or two maps per allocation.
The default value is 65530.
+memfd_noexec:
+=============
+This pid namespaced sysctl controls memfd_create().
+
+The new MFD_NOEXEC_SEAL and MFD_EXEC flags of memfd_create() allows
+application to set executable bit at creation time.
+
+When MFD_NOEXEC_SEAL is set, memfd is created without executable bit
+(mode:0666), and sealed with F_SEAL_EXEC, so it can't be chmod to
+be executable (mode: 0777) after creation.
+
+when MFD_EXEC flag is set, memfd is created with executable bit
+(mode:0777), this is the same as the old behavior of memfd_create.
+
+The new pid namespaced sysctl vm.memfd_noexec has 3 values:
+0: memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL acts like
+ MFD_EXEC was set.
+1: memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL acts like
+ MFD_NOEXEC_SEAL was set.
+2: memfd_create() without MFD_NOEXEC_SEAL will be rejected.
+
+The default value is 0.
+
+Once set, it can't be downgraded at runtime, i.e. 2=>1, 1=>0
+are denied.
+
+This is pid namespaced sysctl, child processes inherit the parent
+process's pid at the time of fork. Changes to the parent process
+after fork are not automatically propagated to the child process.
memory_failure_early_kill:
==========================
--
2.41.0.255.g8b1d071c50-goog