Messages in this thread | | | Date | Wed, 29 May 2002 00:08:35 +0200 | From | Pavel Machek <> | Subject | DO NOT APPLY Re: swsusp: cleanup -- use list_for_each in head_of_free_region |
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Hi!
> This cleans up is_head_of_free_region, thanks to William Lee Irwin III > <wli@holomorphy.com>. Please apply,
It forgets to spin_unlock when it sees free page. Sorry about that. Just forget this patch, I'll get you better variant in 2.5.19. Its only cosmetics, anyway. Pavel
> --- linux-swsusp.test//mm/page_alloc.c Sun May 26 19:32:05 2002 > +++ linux-swsusp/mm/page_alloc.c Tue May 28 21:19:26 2002 > @@ -249,42 +249,31 @@ > } > > #ifdef CONFIG_SOFTWARE_SUSPEND > -int is_head_of_free_region(struct page *p) > +int is_head_of_free_region(struct page *page) > { > - pg_data_t *pgdat = pgdat_list; > - unsigned type; > - unsigned long flags; > + zone_t *zone, *node_zones = pgdat_list->node_zones; > + unsigned long flags; > > - for (type=0;type < MAX_NR_ZONES; type++) { > - zone_t *zone = pgdat->node_zones + type; > - int order = MAX_ORDER - 1; > - free_area_t *area; > - struct list_head *head, *curr; > - spin_lock_irqsave(&zone->lock, flags); /* Should not matter as we need quiescent system for suspend anyway, but... */ > + for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; ++zone) { > + int order; > + list_t *curr; > > - do { > - area = zone->free_area + order; > - head = &area->free_list; > - curr = head; > - > - for(;;) { > - if(!curr) { > -// printk("FIXME: this should not happen but it does!!!"); > + /* > + * Should not matter as we need quiescent system for > + * suspend anyway, but... > + */ > + spin_lock_irqsave(&zone->lock, flags); > + for (order = MAX_ORDER - 1; order >= 0; --order) > + list_for_each(curr, &zone->free_area[order].free_list) { > + if (!curr) > break; > - } > - if(p != memlist_entry(curr, struct page, list)) { > - curr = memlist_next(curr); > - if (curr == head) > - break; > - continue; > - } > - return 1 << order; > + if (page == list_entry(curr, struct page, list)) > + return 1 << order; > } > - } while(order--); > - spin_unlock_irqrestore(&zone->lock, flags); > + spin_unlock_irqrestore(&zone->lock, flags); > > - } > - return 0; > + } > + return 0; > } > #endif /* CONFIG_SOFTWARE_SUSPEND */ > > > >
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