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mm: nommu: move sysctl to mm/nommu.c

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The sysctl_nr_trim_pages belongs to nommu.c, move it to mm/nommu.c
from /kernel/sysctl.c. And remove the useless extern variable declaration
from include/linux/mm.h

Signed-off-by: Kaixiong Yu <yukaixiong@huawei.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Joel Granados <joel.granados@kernel.org>
This commit is contained in:
Kaixiong Yu 2025-01-11 15:07:43 +08:00 committed by Joel Granados
parent b121dd4d55
commit 97f5420ef1
3 changed files with 14 additions and 13 deletions
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2
include/linux/mm.h
View File

@ -4066,8 +4066,6 @@ unsigned long wp_shared_mapping_range(struct address_space *mapping,
pgoff_t first_index, pgoff_t nr);
#endif
extern int sysctl_nr_trim_pages;
#ifdef CONFIG_ANON_VMA_NAME
int madvise_set_anon_name(struct mm_struct *mm, unsigned long start,
unsigned long len_in,

10
kernel/sysctl.c
View File

@ -2031,16 +2031,6 @@ static const struct ctl_table vm_table[] = {
.extra1 = SYSCTL_ONE,
.extra2 = SYSCTL_FOUR,
},
#ifndef CONFIG_MMU
{
.procname = "nr_trim_pages",
.data = &sysctl_nr_trim_pages,
.maxlen = sizeof(sysctl_nr_trim_pages),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = SYSCTL_ZERO,
},
#endif
{
.procname = "vfs_cache_pressure",
.data = &sysctl_vfs_cache_pressure,

15
mm/nommu.c
View File

@ -48,7 +48,6 @@ struct page *mem_map;
unsigned long max_mapnr;
EXPORT_SYMBOL(max_mapnr);
unsigned long highest_memmap_pfn;
int sysctl_nr_trim_pages = CONFIG_NOMMU_INITIAL_TRIM_EXCESS;
int heap_stack_gap = 0;
atomic_long_t mmap_pages_allocated;
@ -392,6 +391,19 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
return mm->brk = brk;
}
static int sysctl_nr_trim_pages = CONFIG_NOMMU_INITIAL_TRIM_EXCESS;
static const struct ctl_table nommu_table[] = {
{
.procname = "nr_trim_pages",
.data = &sysctl_nr_trim_pages,
.maxlen = sizeof(sysctl_nr_trim_pages),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = SYSCTL_ZERO,
},
};
/*
* initialise the percpu counter for VM and region record slabs
*/
@ -402,6 +414,7 @@ void __init mmap_init(void)
ret = percpu_counter_init(&vm_committed_as, 0, GFP_KERNEL);
VM_BUG_ON(ret);
vm_region_jar = KMEM_CACHE(vm_region, SLAB_PANIC|SLAB_ACCOUNT);
register_sysctl_init("vm", nommu_table);
}
/*