Suren Baghdasaryan
16c2b1d94f
If page_pinner is configured with page_pinner_enabled=false and
failure_tracking=true, pp_buffer will be accessed without being
initialized. Prevent this by adding page_pinner_inited checks in
functions that access it.
Fixes: 898cfbf094a2 ("ANDROID: mm: introduce page_pinner")
Bug: 259024332
Bug: 260179017
Change-Id: I8f612cae3e74d36e8a4eee5edec25281246cbe5e
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit 23fb3111f63e5fe239a769668275c20493a5849c)
95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_PAGE_PINNER_H
|
|
#define __LINUX_PAGE_PINNER_H
|
|
|
|
#include <linux/jump_label.h>
|
|
|
|
#ifdef CONFIG_PAGE_PINNER
|
|
extern struct static_key_false page_pinner_inited;
|
|
extern struct static_key_true failure_tracking;
|
|
extern struct page_ext_operations page_pinner_ops;
|
|
|
|
extern void __reset_page_pinner(struct page *page, unsigned int order, bool free);
|
|
extern void __set_page_pinner(struct page *page, unsigned int order);
|
|
extern void __dump_page_pinner(struct page *page);
|
|
void __page_pinner_migration_failed(struct page *page);
|
|
void __page_pinner_mark_migration_failed_pages(struct list_head *page_list);
|
|
|
|
static inline void reset_page_pinner(struct page *page, unsigned int order)
|
|
{
|
|
if (static_branch_unlikely(&page_pinner_inited))
|
|
__reset_page_pinner(page, order, false);
|
|
}
|
|
|
|
static inline void free_page_pinner(struct page *page, unsigned int order)
|
|
{
|
|
if (static_branch_unlikely(&page_pinner_inited))
|
|
__reset_page_pinner(page, order, true);
|
|
}
|
|
|
|
static inline void set_page_pinner(struct page *page, unsigned int order)
|
|
{
|
|
if (static_branch_unlikely(&page_pinner_inited))
|
|
__set_page_pinner(page, order);
|
|
}
|
|
|
|
static inline void dump_page_pinner(struct page *page)
|
|
{
|
|
if (static_branch_unlikely(&page_pinner_inited))
|
|
__dump_page_pinner(page);
|
|
}
|
|
|
|
static inline void page_pinner_put_page(struct page *page)
|
|
{
|
|
if (!static_branch_unlikely(&page_pinner_inited))
|
|
return;
|
|
|
|
if (!static_branch_unlikely(&failure_tracking))
|
|
return;
|
|
|
|
__page_pinner_migration_failed(page);
|
|
}
|
|
|
|
static inline void page_pinner_failure_detect(struct page *page)
|
|
{
|
|
if (!static_branch_unlikely(&page_pinner_inited))
|
|
return;
|
|
|
|
if (!static_branch_unlikely(&failure_tracking))
|
|
return;
|
|
|
|
__page_pinner_migration_failed(page);
|
|
}
|
|
|
|
static inline void page_pinner_mark_migration_failed_pages(struct list_head *page_list)
|
|
{
|
|
if (!static_branch_unlikely(&failure_tracking))
|
|
return;
|
|
|
|
__page_pinner_mark_migration_failed_pages(page_list);
|
|
}
|
|
#else
|
|
static inline void reset_page_pinner(struct page *page, unsigned int order)
|
|
{
|
|
}
|
|
static inline void free_page_pinner(struct page *page, unsigned int order)
|
|
{
|
|
}
|
|
static inline void set_page_pinner(struct page *page, unsigned int order)
|
|
{
|
|
}
|
|
static inline void dump_page_pinner(struct page *page)
|
|
{
|
|
}
|
|
static inline void page_pinner_put_page(struct page *page)
|
|
{
|
|
}
|
|
static inline void page_pinner_failure_detect(struct page *page)
|
|
{
|
|
}
|
|
static inline void page_pinner_mark_migration_failed_pages(struct list_head *page_list)
|
|
{
|
|
}
|
|
#endif /* CONFIG_PAGE_PINNER */
|
|
#endif /* __LINUX_PAGE_PINNER_H */
|