From 054bd4c18853f3a3851bd97aa90e11022a69dc42 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 8 Nov 2005 21:34:39 -0800 Subject: [PATCH] swsusp: reduce code duplication MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The changes made by this patch are necessary for the pagedir relocation simplification in the next patch.  Additionally, these changes allow us to drop check_pagedir() and make get_safe_page() be a one-line wrapper around alloc_image_page() (get_safe_page() goes to snapshot.c, because alloc_image_page() is static and it does not make sense to export it). Signed-off-by: Rafael J. Wysocki Cc: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/power/swsusp.c | 57 ++------------------------------------------------- 1 file changed, 2 insertions(+), 55 deletions(-) (limited to 'kernel/power/swsusp.c') diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c index e1ab28b..a456ffe 100644 --- a/kernel/power/swsusp.c +++ b/kernel/power/swsusp.c @@ -629,59 +629,6 @@ int swsusp_resume(void) } /** - * On resume, for storing the PBE list and the image, - * we can only use memory pages that do not conflict with the pages - * which had been used before suspend. - * - * We don't know which pages are usable until we allocate them. - * - * Allocated but unusable (ie eaten) memory pages are marked so that - * swsusp_free() can release them - */ - -unsigned long get_safe_page(gfp_t gfp_mask) -{ - unsigned long m; - - do { - m = get_zeroed_page(gfp_mask); - if (m && PageNosaveFree(virt_to_page(m))) - /* This is for swsusp_free() */ - SetPageNosave(virt_to_page(m)); - } while (m && PageNosaveFree(virt_to_page(m))); - if (m) { - /* This is for swsusp_free() */ - SetPageNosave(virt_to_page(m)); - SetPageNosaveFree(virt_to_page(m)); - } - return m; -} - -/** - * check_pagedir - We ensure here that pages that the PBEs point to - * won't collide with pages where we're going to restore from the loaded - * pages later - */ - -static int check_pagedir(struct pbe *pblist) -{ - struct pbe *p; - - /* This is necessary, so that we can free allocated pages - * in case of failure - */ - for_each_pbe (p, pblist) - p->address = 0UL; - - for_each_pbe (p, pblist) { - p->address = get_safe_page(GFP_ATOMIC); - if (!p->address) - return -ENOMEM; - } - return 0; -} - -/** * swsusp_pagedir_relocate - It is possible, that some memory pages * occupied by the list of PBEs collide with pages where we're going to * restore from the loaded pages later. We relocate them here. @@ -990,7 +937,7 @@ static int read_suspend_image(void) int error = 0; struct pbe *p; - if (!(p = alloc_pagedir(nr_copy_pages))) + if (!(p = alloc_pagedir(nr_copy_pages, GFP_ATOMIC, 0))) return -ENOMEM; if ((error = read_pagedir(p))) @@ -1003,7 +950,7 @@ static int read_suspend_image(void) /* Allocate memory for the image and read the data from swap */ - error = check_pagedir(pagedir_nosave); + error = alloc_data_pages(pagedir_nosave, GFP_ATOMIC, 1); if (!error) error = data_read(pagedir_nosave); -- cgit v1.1