From 404e603f1ec8520ca09b606496a55cfdcead4e15 Mon Sep 17 00:00:00 2001 From: Chris Packham Date: Wed, 15 Apr 2020 10:12:22 +1200 Subject: docs: timekeeping: Use correct prototype for deprecated functions Use the correct prototypes for do_gettimeofday(), getnstimeofday() and getnstimeofday64(). All of these returned void and passed the return value by reference. This should make the documentation of their deprecation and replacements easier to search for. Signed-off-by: Chris Packham Acked-by: Arnd Bergmann Link: https://lore.kernel.org/r/20200414221222.23996-1-chris.packham@alliedtelesis.co.nz Signed-off-by: Jonathan Corbet --- Documentation/core-api/timekeeping.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/core-api/timekeeping.rst b/Documentation/core-api/timekeeping.rst index c0ffa30c7c37..729e24864fe7 100644 --- a/Documentation/core-api/timekeeping.rst +++ b/Documentation/core-api/timekeeping.rst @@ -154,9 +154,9 @@ architectures. These are the recommended replacements: Use ktime_get() or ktime_get_ts64() instead. -.. c:function:: struct timeval do_gettimeofday( void ) - struct timespec getnstimeofday( void ) - struct timespec64 getnstimeofday64( void ) +.. c:function:: void do_gettimeofday( struct timeval * ) + void getnstimeofday( struct timespec * ) + void getnstimeofday64( struct timespec64 * ) void ktime_get_real_ts( struct timespec * ) ktime_get_real_ts64() is a direct replacement, but consider using -- cgit v1.2.3 From 52338dfb3ca11e6a99288e9e9e4019f279822ddd Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Tue, 14 Apr 2020 10:24:30 -0700 Subject: docs: admin-guide: merge sections for the kernel.modprobe sysctl Documentation for the kernel.modprobe sysctl was added both by commit 0317c5371e6a ("docs: merge debugging-modules.txt into sysctl/kernel.rst") and by commit 6e7158250625 ("docs: admin-guide: document the kernel.modprobe sysctl"), resulting in the same sysctl being documented in two places. Merge these into one place. Signed-off-by: Eric Biggers Reviewed-by: Stephen Kitt Link: https://lore.kernel.org/r/20200414172430.230293-1-ebiggers@kernel.org Signed-off-by: Jonathan Corbet --- Documentation/admin-guide/sysctl/kernel.rst | 47 ++++++++++++----------------- 1 file changed, 19 insertions(+), 28 deletions(-) (limited to 'Documentation') diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 39c95c0e13d3..0d427fd10941 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -390,9 +390,17 @@ When ``kptr_restrict`` is set to 2, kernel pointers printed using modprobe ======== -This gives the full path of the modprobe command which the kernel will -use to load modules. This can be used to debug module loading -requests:: +The full path to the usermode helper for autoloading kernel modules, +by default "/sbin/modprobe". This binary is executed when the kernel +requests a module. For example, if userspace passes an unknown +filesystem type to mount(), then the kernel will automatically request +the corresponding filesystem module by executing this usermode helper. +This usermode helper should insert the needed module into the kernel. + +This sysctl only affects module autoloading. It has no effect on the +ability to explicitly insert modules. + +This sysctl can be used to debug module loading requests:: echo '#! /bin/sh' > /tmp/modprobe echo 'echo "$@" >> /tmp/modprobe.log' >> /tmp/modprobe @@ -400,10 +408,15 @@ requests:: chmod a+x /tmp/modprobe echo /tmp/modprobe > /proc/sys/kernel/modprobe -This only applies when the *kernel* is requesting that the module be -loaded; it won't have any effect if the module is being loaded -explicitly using ``modprobe`` from userspace. +Alternatively, if this sysctl is set to the empty string, then module +autoloading is completely disabled. The kernel will not try to +execute a usermode helper at all, nor will it call the +kernel_module_request LSM hook. +If CONFIG_STATIC_USERMODEHELPER=y is set in the kernel configuration, +then the configured static usermode helper overrides this sysctl, +except that the empty string is still accepted to completely disable +module autoloading as described above. modules_disabled ================ @@ -446,28 +459,6 @@ Notes: successful IPC object allocation. If an IPC object allocation syscall fails, it is undefined if the value remains unmodified or is reset to -1. -modprobe: -========= - -The path to the usermode helper for autoloading kernel modules, by -default "/sbin/modprobe". This binary is executed when the kernel -requests a module. For example, if userspace passes an unknown -filesystem type to mount(), then the kernel will automatically request -the corresponding filesystem module by executing this usermode helper. -This usermode helper should insert the needed module into the kernel. - -This sysctl only affects module autoloading. It has no effect on the -ability to explicitly insert modules. - -If this sysctl is set to the empty string, then module autoloading is -completely disabled. The kernel will not try to execute a usermode -helper at all, nor will it call the kernel_module_request LSM hook. - -If CONFIG_STATIC_USERMODEHELPER=y is set in the kernel configuration, -then the configured static usermode helper overrides this sysctl, -except that the empty string is still accepted to completely disable -module autoloading as described above. - nmi_watchdog ============ -- cgit v1.2.3