On Mon, Jul 31, 2023 at 09:17:17AM +0200, Joel Granados wrote: > The new ctl_table_size element will hold the size of the ctl_table > arrays contained in the ctl_table_header. This value should eventually > be passed by the callers to the sysctl register infrastructure. And > while this commit introduces the variable, it does not set nor use it > because that requires case by case considerations for each caller. > > It provides two important things: (1) A place to put the > result of the ctl_table array calculation when it gets introduced for > each caller. And (2) the size that will be used as the additional > stopping criteria in the list_for_each_table_entry macro (to be added > when all the callers are migrated) > > Signed-off-by: Joel Granados <j.granados@xxxxxxxxxxx> > --- > include/linux/sysctl.h | 14 ++++++++++++-- > 1 file changed, 12 insertions(+), 2 deletions(-) > > diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h > index 59d451f455bf..33252ad58ebe 100644 > --- a/include/linux/sysctl.h > +++ b/include/linux/sysctl.h > @@ -159,12 +159,22 @@ struct ctl_node { > struct ctl_table_header *header; > }; > > -/* struct ctl_table_header is used to maintain dynamic lists of > - struct ctl_table trees. */ > +/** > + * struct ctl_table_header - maintains dynamic lists of struct ctl_table trees > + * @ctl_table: pointer to the first element in ctl_table array > + * @ctl_table_size: number of elements pointed by @ctl_table > + * @used: The entry will never be touched when equal to 0. > + * @count: Upped every time something is added to @inodes and downed every time > + * something is removed from inodes > + * @nreg: When nreg drops to 0 the ctl_table_header will be unregistered. > + * @rcu: Delays the freeing of the inode. Introduced with "unfuck proc_sysctl ->d_compare()" > + * > + */ Hi Joel, Please consider also adding kernel doc entries for the other fields of struct ctl_table_header. According to ./scripts/kernel-doc -none they are: unregistering ctl_table_arg root set parent node inodes > struct ctl_table_header { > union { > struct { > struct ctl_table *ctl_table; > + int ctl_table_size; > int used; > int count; > int nreg; > -- > 2.30.2 >