[PATCH v2 1/8] S390: Remove now superfluous sentinel elem from ctl_table arrays
Joel Granados via B4 Relay <[email protected]>
| Newsgroups | gmane.linux.ports.ia64,gmane.linux.file-systems,gmane.linux.kernel,gmane.linux.ports.arm.kernel,gmane.linux.ports.riscv,gmane.linux.ports.ppc64.devel |
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| Message-ID | <20230913-jag-sysctl_remove_empty_elem_arch-v2-1-d1bd13a29bae@samsung.com> |
From: Joel Granados <[email protected]> This commit comes at the tail end of a greater effort to remove the empty elements at the end of the ctl_table arrays (sentinels) which will reduce the overall build time size of the kernel and run time memory bloat by ~64 bytes per sentinel (further information Link : https://lore.kernel.org/all/ZO5Yx5JFogGi%[email protected]/) Remove the sentinel element from appldata_table, s390dbf_table, topology_ctl_table, cmm_table and page_table_sysctl. Reduced the memory allocation in appldata_register_ops by 1 effectively removing the sentinel from ops->ctl_table. This removal is safe because register_sysctl_sz and register_sysctl use the array size in addition to checking for the sentinel. Tested-by: Alexander Gordeev <[email protected]> Acked-by: Heiko Carstens <[email protected]> Signed-off-by: Joel Granados <[email protected]> --- arch/s390/appldata/appldata_base.c | 6 ++---- arch/s390/kernel/debug.c | 3 +-- arch/s390/kernel/topology.c | 3 +-- arch/s390/mm/cmm.c | 3 +-- arch/s390/mm/pgalloc.c | 3 +-- 5 files changed, 6 insertions(+), 12 deletions(-) diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c index 3b0994625652..872a644b1fd1 100644 --- a/arch/s390/appldata/appldata_base.c +++ b/arch/s390/appldata/appldata_base.c @@ -62,8 +62,7 @@ static struct ctl_table appldata_table[] = { .procname = "interval", .mode = S_IRUGO | S_IWUSR, .proc_handler = appldata_interval_handler, - }, - { }, + } }; /* @@ -351,8 +350,7 @@ int appldata_register_ops(struct appldata_ops *ops) if (ops->size > APPLDATA_MAX_REC_SIZE) return -EINVAL; - /* The last entry must be an empty one */ - ops->ctl_table = kcalloc(2, sizeof(struct ctl_table), GFP_KERNEL); + ops->ctl_table = kcalloc(1, sizeof(struct ctl_table), GFP_KERNEL); if (!ops->ctl_table) return -ENOMEM; diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c index a85e0c3e7027..150e2bfff0b3 100644 --- a/arch/s390/kernel/debug.c +++ b/arch/s390/kernel/debug.c @@ -977,8 +977,7 @@ static struct ctl_table s390dbf_table[] = { .maxlen = sizeof(int), .mode = S_IRUGO | S_IWUSR, .proc_handler = s390dbf_procactive, - }, - { } + } }; static struct ctl_table_header *s390dbf_sysctl_header; diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 68adf1de8888..9dcfac416669 100644 --- a/arch/s390/kernel/topology.c +++ b/arch/s390/kernel/topology.c @@ -635,8 +635,7 @@ static struct ctl_table topology_ctl_table[] = { .procname = "topology", .mode = 0644, .proc_handler = topology_ctl_handler, - }, - { }, + } }; static int __init topology_init(void) diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index f47515313226..8937aa7090b3 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -331,8 +331,7 @@ static struct ctl_table cmm_table[] = { .procname = "cmm_timeout", .mode = 0644, .proc_handler = cmm_timeout_handler, - }, - { } + } }; #ifdef CONFIG_CMM_IUCV diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c index 07fc660a24aa..e8cecd31715f 100644 --- a/arch/s390/mm/pgalloc.c +++ b/arch/s390/mm/pgalloc.c @@ -29,8 +29,7 @@ static struct ctl_table page_table_sysctl[] = { .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, - }, - { } + } }; static int __init page_table_register_sysctl(void) -- 2.30.2