Drivers can pass order of pages to be reported while registering itself. Today, this is a magic number, 0.
Label this with PAGE_REPORTING_ORDER_UNSPECIFIED and check for it when the driver is being registered. This macro will be used in relevant drivers next. Signed-off-by: Yuvraj Sakshith <[email protected]> --- include/linux/page_reporting.h | 1 + mm/page_reporting.c | 5 +++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/linux/page_reporting.h b/include/linux/page_reporting.h index fe648dfa3..d1886c657 100644 --- a/include/linux/page_reporting.h +++ b/include/linux/page_reporting.h @@ -7,6 +7,7 @@ /* This value should always be a power of 2, see page_reporting_cycle() */ #define PAGE_REPORTING_CAPACITY 32 +#define PAGE_REPORTING_ORDER_UNSPECIFIED 0 struct page_reporting_dev_info { /* function that alters pages to make them "reported" */ diff --git a/mm/page_reporting.c b/mm/page_reporting.c index e4c428e61..40a756b60 100644 --- a/mm/page_reporting.c +++ b/mm/page_reporting.c @@ -369,8 +369,9 @@ int page_reporting_register(struct page_reporting_dev_info *prdev) * pageblock_order. */ - if (page_reporting_order == -1) { - if (prdev->order > 0 && prdev->order <= MAX_PAGE_ORDER) + if (page_reporting_order == PAGE_REPORTING_ORDER_UNSPECIFIED) { + if (prdev->order != PAGE_REPORTING_ORDER_UNSPECIFIED && + prdev->order <= MAX_PAGE_ORDER) page_reporting_order = prdev->order; else page_reporting_order = pageblock_order; -- 2.34.1
