mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 05:50:52 +07:00
7fab358d90
Macro HUGETLBFS_SB is clear enough, so one statement is clearer than 3 lines statements. Remove redundant return statements for non-return functions, which can save lines, at least. Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/*
|
|
* Copyright IBM Corporation, 2012
|
|
* Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of version 2.1 of the GNU Lesser General Public License
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
*/
|
|
|
|
#ifndef _LINUX_HUGETLB_CGROUP_H
|
|
#define _LINUX_HUGETLB_CGROUP_H
|
|
|
|
#include <linux/mmdebug.h>
|
|
|
|
struct hugetlb_cgroup;
|
|
/*
|
|
* Minimum page order trackable by hugetlb cgroup.
|
|
* At least 3 pages are necessary for all the tracking information.
|
|
*/
|
|
#define HUGETLB_CGROUP_MIN_ORDER 2
|
|
|
|
#ifdef CONFIG_CGROUP_HUGETLB
|
|
|
|
static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
|
|
{
|
|
VM_BUG_ON_PAGE(!PageHuge(page), page);
|
|
|
|
if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
|
|
return NULL;
|
|
return (struct hugetlb_cgroup *)page[2].private;
|
|
}
|
|
|
|
static inline
|
|
int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)
|
|
{
|
|
VM_BUG_ON_PAGE(!PageHuge(page), page);
|
|
|
|
if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
|
|
return -1;
|
|
page[2].private = (unsigned long)h_cg;
|
|
return 0;
|
|
}
|
|
|
|
static inline bool hugetlb_cgroup_disabled(void)
|
|
{
|
|
return !cgroup_subsys_enabled(hugetlb_cgrp_subsys);
|
|
}
|
|
|
|
extern int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
|
|
struct hugetlb_cgroup **ptr);
|
|
extern void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
|
|
struct hugetlb_cgroup *h_cg,
|
|
struct page *page);
|
|
extern void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
|
|
struct page *page);
|
|
extern void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
|
|
struct hugetlb_cgroup *h_cg);
|
|
extern void hugetlb_cgroup_file_init(void) __init;
|
|
extern void hugetlb_cgroup_migrate(struct page *oldhpage,
|
|
struct page *newhpage);
|
|
|
|
#else
|
|
static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline
|
|
int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool hugetlb_cgroup_disabled(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline int
|
|
hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
|
|
struct hugetlb_cgroup **ptr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
|
|
struct hugetlb_cgroup *h_cg,
|
|
struct page *page)
|
|
{
|
|
}
|
|
|
|
static inline void
|
|
hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, struct page *page)
|
|
{
|
|
}
|
|
|
|
static inline void
|
|
hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
|
|
struct hugetlb_cgroup *h_cg)
|
|
{
|
|
}
|
|
|
|
static inline void hugetlb_cgroup_file_init(void)
|
|
{
|
|
}
|
|
|
|
static inline void hugetlb_cgroup_migrate(struct page *oldhpage,
|
|
struct page *newhpage)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_MEM_RES_CTLR_HUGETLB */
|
|
#endif
|