diff --git a/include/linux/swap.h b/include/linux/swap.h index dfabf4660a67..fbc6805358da 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -503,15 +503,6 @@ static inline struct swap_info_struct *swp_swap_info(swp_entry_t entry) return NULL; } -static inline struct swap_info_struct *get_swap_device(swp_entry_t entry) -{ - return NULL; -} - -static inline void put_swap_device(struct swap_info_struct *si) -{ -} - #define swap_address_space(entry) (NULL) #define get_nr_swap_pages() 0L #define total_swap_pages 0L diff --git a/mm/memory.c b/mm/memory.c index 0a905e0a7e67..eb31b3e4ef93 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3302,7 +3302,6 @@ vm_fault_t do_swap_page(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct page *page = NULL, *swapcache; - struct swap_info_struct *si = NULL; swp_entry_t entry; pte_t pte; int locked; @@ -3330,16 +3329,14 @@ vm_fault_t do_swap_page(struct vm_fault *vmf) goto out; } - /* Prevent swapoff from happening to us. */ - si = get_swap_device(entry); - if (unlikely(!si)) - goto out; delayacct_set_flag(DELAYACCT_PF_SWAPIN); page = lookup_swap_cache(entry, vma, vmf->address); swapcache = page; if (!page) { + struct swap_info_struct *si = swp_swap_info(entry); + if (data_race(si->flags & SWP_SYNCHRONOUS_IO) && __swap_count(entry) == 1) { /* skip swapcache */ @@ -3510,8 +3507,6 @@ vm_fault_t do_swap_page(struct vm_fault *vmf) unlock: pte_unmap_unlock(vmf->pte, vmf->ptl); out: - if (si) - put_swap_device(si); return ret; out_nomap: pte_unmap_unlock(vmf->pte, vmf->ptl); @@ -3523,8 +3518,6 @@ vm_fault_t do_swap_page(struct vm_fault *vmf) unlock_page(swapcache); put_page(swapcache); } - if (si) - put_swap_device(si); return ret; }