From: Joel Granados <j.granados@xxxxxxxxxxx> 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%2FcBo@xxxxxxxxxxxxxxxxxxxxxx/) Removed the sentinel as well as the explicit size from ctl_isa_vars. The size is redundant as the initialization sets it. Changed insn_emulation->sysctl from a 2 element array of struct ctl_table to a simple struct. This has no consequence for the sysctl registration as it is forwarded as a pointer. Removed sentinel from sve_defatul_vl_table, sme_default_vl_table, tagged_addr_sysctl_table and armv8_pmu_sysctl_table. This removal is safe because register_sysctl_sz and register_sysctl use the array size in addition to checking for the sentinel. Signed-off-by: Joel Granados <j.granados@xxxxxxxxxxx> --- arch/arm/kernel/isa.c | 4 ++-- arch/arm64/kernel/armv8_deprecated.c | 8 +++----- arch/arm64/kernel/fpsimd.c | 6 ++---- arch/arm64/kernel/process.c | 3 +-- drivers/perf/arm_pmuv3.c | 3 +-- 5 files changed, 9 insertions(+), 15 deletions(-) diff --git a/arch/arm/kernel/isa.c b/arch/arm/kernel/isa.c index 20218876bef2..0b9c28077092 100644 --- a/arch/arm/kernel/isa.c +++ b/arch/arm/kernel/isa.c @@ -16,7 +16,7 @@ static unsigned int isa_membase, isa_portbase, isa_portshift; -static struct ctl_table ctl_isa_vars[4] = { +static struct ctl_table ctl_isa_vars[] = { { .procname = "membase", .data = &isa_membase, @@ -35,7 +35,7 @@ static struct ctl_table ctl_isa_vars[4] = { .maxlen = sizeof(isa_portshift), .mode = 0444, .proc_handler = proc_dointvec, - }, {} + } }; static struct ctl_table_header *isa_sysctl_header; diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c index e459cfd33711..dd6ce86d4332 100644 --- a/arch/arm64/kernel/armv8_deprecated.c +++ b/arch/arm64/kernel/armv8_deprecated.c @@ -52,10 +52,8 @@ struct insn_emulation { int min; int max; - /* - * sysctl for this emulation + a sentinal entry. - */ - struct ctl_table sysctl[2]; + /* sysctl for this emulation */ + struct ctl_table sysctl; }; #define ARM_OPCODE_CONDTEST_FAIL 0 @@ -558,7 +556,7 @@ static void __init register_insn_emulation(struct insn_emulation *insn) update_insn_emulation_mode(insn, INSN_UNDEF); if (insn->status != INSN_UNAVAILABLE) { - sysctl = &insn->sysctl[0]; + sysctl = &insn->sysctl; sysctl->mode = 0644; sysctl->maxlen = sizeof(int); diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 91e44ac7150f..db3ad1ba8272 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -588,8 +588,7 @@ static struct ctl_table sve_default_vl_table[] = { .mode = 0644, .proc_handler = vec_proc_do_default_vl, .extra1 = &vl_info[ARM64_VEC_SVE], - }, - { } + } }; static int __init sve_sysctl_init(void) @@ -612,8 +611,7 @@ static struct ctl_table sme_default_vl_table[] = { .mode = 0644, .proc_handler = vec_proc_do_default_vl, .extra1 = &vl_info[ARM64_VEC_SME], - }, - { } + } }; static int __init sme_sysctl_init(void) diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 0fcc4eb1a7ab..48861cdc3aae 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -723,8 +723,7 @@ static struct ctl_table tagged_addr_sysctl_table[] = { .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, - }, - { } + } }; static int __init tagged_addr_init(void) diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index e5a2ac4155f6..c4aa6a8d1b05 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -1172,8 +1172,7 @@ static struct ctl_table armv8_pmu_sysctl_table[] = { .proc_handler = armv8pmu_proc_user_access_handler, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, - }, - { } + } }; static void armv8_pmu_register_sysctl_table(void) -- 2.30.2
