From 7be9823491ecbaf9700d7d3502cb4b4dd0ed868a Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sun, 6 May 2007 14:50:42 -0700 Subject: [PATCH] swsusp: use inline functions for changing page flags Replace direct invocations of SetPageNosave(), SetPageNosaveFree() etc. with calls to inline functions that can be changed in subsequent patches without modifying the code calling them. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/suspend.h | 33 ++++++++++++++++++++++++++++ kernel/power/snapshot.c | 48 +++++++++++++++++++++-------------------- mm/page_alloc.c | 6 +++--- 3 files changed, 61 insertions(+), 26 deletions(-) diff --git a/include/linux/suspend.h b/include/linux/suspend.h index bf99bd49f8..a45b9f5144 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -8,6 +8,7 @@ #include #include #include +#include /* struct pbe is used for creating lists of pages that should be restored * atomically during the resume from disk, because the page frames they have @@ -49,6 +50,38 @@ void __save_processor_state(struct saved_context *ctxt); void __restore_processor_state(struct saved_context *ctxt); unsigned long get_safe_page(gfp_t gfp_mask); +/* Page management functions for the software suspend (swsusp) */ + +static inline void swsusp_set_page_forbidden(struct page *page) +{ + SetPageNosave(page); +} + +static inline int swsusp_page_is_forbidden(struct page *page) +{ + return PageNosave(page); +} + +static inline void swsusp_unset_page_forbidden(struct page *page) +{ + ClearPageNosave(page); +} + +static inline void swsusp_set_page_free(struct page *page) +{ + SetPageNosaveFree(page); +} + +static inline int swsusp_page_is_free(struct page *page) +{ + return PageNosaveFree(page); +} + +static inline void swsusp_unset_page_free(struct page *page) +{ + ClearPageNosaveFree(page); +} + /* * XXX: We try to keep some more pages free so that I/O operations succeed * without paging. Might this be more? diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 704c25a3ff..48fc7a3557 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -67,15 +67,15 @@ static void *get_image_page(gfp_t gfp_mask, int safe_needed) res = (void *)get_zeroed_page(gfp_mask); if (safe_needed) - while (res && PageNosaveFree(virt_to_page(res))) { + while (res && swsusp_page_is_free(virt_to_page(res))) { /* The page is unsafe, mark it for swsusp_free() */ - SetPageNosave(virt_to_page(res)); + swsusp_set_page_forbidden(virt_to_page(res)); allocated_unsafe_pages++; res = (void *)get_zeroed_page(gfp_mask); } if (res) { - SetPageNosave(virt_to_page(res)); - SetPageNosaveFree(virt_to_page(res)); + swsusp_set_page_forbidden(virt_to_page(res)); + swsusp_set_page_free(virt_to_page(res)); } return res; } @@ -91,8 +91,8 @@ static struct page *alloc_image_page(gfp_t gfp_mask) page = alloc_page(gfp_mask); if (page) { - SetPageNosave(page); - SetPageNosaveFree(page); + swsusp_set_page_forbidden(page); + swsusp_set_page_free(page); } return page; } @@ -110,9 +110,9 @@ static inline void free_image_page(void *addr, int clear_nosave_free) page = virt_to_page(addr); - ClearPageNosave(page); + swsusp_unset_page_forbidden(page); if (clear_nosave_free) - ClearPageNosaveFree(page); + swsusp_unset_page_free(page); __free_page(page); } @@ -615,7 +615,8 @@ static struct page *saveable_highmem_page(unsigned long pfn) BUG_ON(!PageHighMem(page)); - if (PageNosave(page) || PageReserved(page) || PageNosaveFree(page)) + if (swsusp_page_is_forbidden(page) || swsusp_page_is_free(page) || + PageReserved(page)) return NULL; return page; @@ -670,7 +671,7 @@ static struct page *saveable_page(unsigned long pfn) BUG_ON(PageHighMem(page)); - if (PageNosave(page) || PageNosaveFree(page)) + if (swsusp_page_is_forbidden(page) || swsusp_page_is_free(page)) return NULL; if (PageReserved(page) && pfn_is_nosave(pfn)) @@ -810,9 +811,10 @@ void swsusp_free(void) if (pfn_valid(pfn)) { struct page *page = pfn_to_page(pfn); - if (PageNosave(page) && PageNosaveFree(page)) { - ClearPageNosave(page); - ClearPageNosaveFree(page); + if (swsusp_page_is_forbidden(page) && + swsusp_page_is_free(page)) { + swsusp_unset_page_forbidden(page); + swsusp_unset_page_free(page); __free_page(page); } } @@ -1135,7 +1137,7 @@ static int mark_unsafe_pages(struct memory_bitmap *bm) max_zone_pfn = zone->zone_start_pfn + zone->spanned_pages; for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++) if (pfn_valid(pfn)) - ClearPageNosaveFree(pfn_to_page(pfn)); + swsusp_unset_page_free(pfn_to_page(pfn)); } /* Mark pages that correspond to the "original" pfns as "unsafe" */ @@ -1144,7 +1146,7 @@ static int mark_unsafe_pages(struct memory_bitmap *bm) pfn = memory_bm_next_pfn(bm); if (likely(pfn != BM_END_OF_MAP)) { if (likely(pfn_valid(pfn))) - SetPageNosaveFree(pfn_to_page(pfn)); + swsusp_set_page_free(pfn_to_page(pfn)); else return -EFAULT; } @@ -1310,14 +1312,14 @@ prepare_highmem_image(struct memory_bitmap *bm, unsigned int *nr_highmem_p) struct page *page; page = alloc_page(__GFP_HIGHMEM); - if (!PageNosaveFree(page)) { + if (!swsusp_page_is_free(page)) { /* The page is "safe", set its bit the bitmap */ memory_bm_set_bit(bm, page_to_pfn(page)); safe_highmem_pages++; } /* Mark the page as allocated */ - SetPageNosave(page); - SetPageNosaveFree(page); + swsusp_set_page_forbidden(page); + swsusp_set_page_free(page); } memory_bm_position_reset(bm); safe_highmem_bm = bm; @@ -1349,7 +1351,7 @@ get_highmem_page_buffer(struct page *page, struct chain_allocator *ca) struct highmem_pbe *pbe; void *kaddr; - if (PageNosave(page) && PageNosaveFree(page)) { + if (swsusp_page_is_forbidden(page) && swsusp_page_is_free(page)) { /* We have allocated the "original" page frame and we can * use it directly to store the loaded page. */ @@ -1511,14 +1513,14 @@ prepare_image(struct memory_bitmap *new_bm, struct memory_bitmap *bm) error = -ENOMEM; goto Free; } - if (!PageNosaveFree(virt_to_page(lp))) { + if (!swsusp_page_is_free(virt_to_page(lp))) { /* The page is "safe", add it to the list */ lp->next = safe_pages_list; safe_pages_list = lp; } /* Mark the page as allocated */ - SetPageNosave(virt_to_page(lp)); - SetPageNosaveFree(virt_to_page(lp)); + swsusp_set_page_forbidden(virt_to_page(lp)); + swsusp_set_page_free(virt_to_page(lp)); nr_pages--; } /* Free the reserved safe pages so that chain_alloc() can use them */ @@ -1547,7 +1549,7 @@ static void *get_buffer(struct memory_bitmap *bm, struct chain_allocator *ca) if (PageHighMem(page)) return get_highmem_page_buffer(page, ca); - if (PageNosave(page) && PageNosaveFree(page)) + if (swsusp_page_is_forbidden(page) && swsusp_page_is_free(page)) /* We have allocated the "original" page frame and we can * use it directly to store the loaded page. */ diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 36d713e216..5916431316 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -775,8 +775,8 @@ void mark_free_pages(struct zone *zone) if (pfn_valid(pfn)) { struct page *page = pfn_to_page(pfn); - if (!PageNosave(page)) - ClearPageNosaveFree(page); + if (!swsusp_page_is_forbidden(page)) + swsusp_unset_page_free(page); } for (order = MAX_ORDER - 1; order >= 0; --order) @@ -785,7 +785,7 @@ void mark_free_pages(struct zone *zone) pfn = page_to_pfn(list_entry(curr, struct page, lru)); for (i = 0; i < (1UL << order); i++) - SetPageNosaveFree(pfn_to_page(pfn + i)); + swsusp_set_page_free(pfn_to_page(pfn + i)); } spin_unlock_irqrestore(&zone->lock, flags); -- 2.39.5