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f8a8b94d06
Summary
* Remove "->procname == NULL" check when iterating through sysctl table arrays
Removing sentinels in ctl_table arrays reduces the build time size and
runtime memory consumed by ~64 bytes per array. With all ctl_table
sentinels gone, the additional check for ->procname == NULL that worked in
tandem with the ARRAY_SIZE to calculate the size of the ctl_table arrays is
no longer needed and has been removed. The sysctl register functions now
returns an error if a sentinel is used.
* Preparation patches for sysctl constification
Constifying ctl_table structs prevents the modification of proc_handler
function pointers as they would reside in .rodata. The ctl_table arguments
in sysctl utility functions are const qualified in preparation for a future
treewide proc_handler argument constification commit.
* Misc fixes
Increase robustness of set_ownership by providing sane default ownership
values in case the callee doesn't set them. Bound check proc_dou8vec_minmax
to avoid loading buggy modules and give sysctl testing module a name to
avoid compiler complaints.
Testing
* This got push to linux-next in v6.10-rc2, so it has had more than a month
of testing
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Merge tag 'sysctl-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl
Pull sysctl updates from Joel Granados:
- Remove "->procname == NULL" check when iterating through sysctl table
arrays
Removing sentinels in ctl_table arrays reduces the build time size
and runtime memory consumed by ~64 bytes per array. With all
ctl_table sentinels gone, the additional check for ->procname == NULL
that worked in tandem with the ARRAY_SIZE to calculate the size of
the ctl_table arrays is no longer needed and has been removed. The
sysctl register functions now returns an error if a sentinel is used.
- Preparation patches for sysctl constification
Constifying ctl_table structs prevents the modification of
proc_handler function pointers as they would reside in .rodata. The
ctl_table arguments in sysctl utility functions are const qualified
in preparation for a future treewide proc_handler argument
constification commit.
- Misc fixes
Increase robustness of set_ownership by providing sane default
ownership values in case the callee doesn't set them. Bound check
proc_dou8vec_minmax to avoid loading buggy modules and give sysctl
testing module a name to avoid compiler complaints.
* tag 'sysctl-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl:
sysctl: Warn on an empty procname element
sysctl: Remove ctl_table sentinel code comments
sysctl: Remove "child" sysctl code comments
sysctl: Remove superfluous empty allocations from sysctl internals
sysctl: Replace nr_entries with ctl_table_size in new_links
sysctl: Remove check for sentinel element in ctl_table arrays
mm profiling: Remove superfluous sentinel element from ctl_table
locking: Remove superfluous sentinel element from kern_lockdep_table
sysctl: Add module description to sysctl-testing
sysctl: constify ctl_table arguments of utility function
utsname: constify ctl_table arguments of utility function
sysctl: move the extra1/2 boundary check of u8 to sysctl_check_table_array
sysctl: always initialize i_uid/i_gid
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