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mm: remove VM_FAULT_WRITE
All users -- GUP and KSM -- are gone, let's just remove it. Link: https://lkml.kernel.org/r/20221021101141.84170-4-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Peter Xu <peterx@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -929,7 +929,6 @@ typedef __bitwise unsigned int vm_fault_t;
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* @VM_FAULT_OOM: Out Of Memory
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* @VM_FAULT_SIGBUS: Bad access
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* @VM_FAULT_MAJOR: Page read from storage
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* @VM_FAULT_WRITE: Special case for get_user_pages
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* @VM_FAULT_HWPOISON: Hit poisoned small page
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* @VM_FAULT_HWPOISON_LARGE: Hit poisoned large page. Index encoded
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* in upper bits
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@ -950,7 +949,6 @@ enum vm_fault_reason {
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VM_FAULT_OOM = (__force vm_fault_t)0x000001,
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VM_FAULT_SIGBUS = (__force vm_fault_t)0x000002,
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VM_FAULT_MAJOR = (__force vm_fault_t)0x000004,
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VM_FAULT_WRITE = (__force vm_fault_t)0x000008,
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VM_FAULT_HWPOISON = (__force vm_fault_t)0x000010,
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VM_FAULT_HWPOISON_LARGE = (__force vm_fault_t)0x000020,
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VM_FAULT_SIGSEGV = (__force vm_fault_t)0x000040,
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@ -976,7 +974,6 @@ enum vm_fault_reason {
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{ VM_FAULT_OOM, "OOM" }, \
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{ VM_FAULT_SIGBUS, "SIGBUS" }, \
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{ VM_FAULT_MAJOR, "MAJOR" }, \
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{ VM_FAULT_WRITE, "WRITE" }, \
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{ VM_FAULT_HWPOISON, "HWPOISON" }, \
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{ VM_FAULT_HWPOISON_LARGE, "HWPOISON_LARGE" }, \
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{ VM_FAULT_SIGSEGV, "SIGSEGV" }, \
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@ -1376,7 +1376,7 @@ vm_fault_t do_huge_pmd_wp_page(struct vm_fault *vmf)
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if (pmdp_set_access_flags(vma, haddr, vmf->pmd, entry, 1))
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update_mmu_cache_pmd(vma, vmf->address, vmf->pmd);
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spin_unlock(vmf->ptl);
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return VM_FAULT_WRITE;
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return 0;
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}
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unlock_fallback:
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@ -3213,7 +3213,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
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}
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delayacct_wpcopy_end();
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return (page_copied && !unshare) ? VM_FAULT_WRITE : 0;
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return 0;
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oom_free_new:
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put_page(new_page);
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oom:
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@ -3277,14 +3277,14 @@ static vm_fault_t wp_pfn_shared(struct vm_fault *vmf)
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return finish_mkwrite_fault(vmf);
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}
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wp_page_reuse(vmf);
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return VM_FAULT_WRITE;
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return 0;
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}
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static vm_fault_t wp_page_shared(struct vm_fault *vmf)
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__releases(vmf->ptl)
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{
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struct vm_area_struct *vma = vmf->vma;
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vm_fault_t ret = VM_FAULT_WRITE;
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vm_fault_t ret = 0;
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get_page(vmf->page);
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@ -3430,7 +3430,7 @@ static vm_fault_t do_wp_page(struct vm_fault *vmf)
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return 0;
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}
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wp_page_reuse(vmf);
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return VM_FAULT_WRITE;
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return 0;
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}
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copy:
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/*
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@ -3944,7 +3944,6 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
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if (vmf->flags & FAULT_FLAG_WRITE) {
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pte = maybe_mkwrite(pte_mkdirty(pte), vma);
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vmf->flags &= ~FAULT_FLAG_WRITE;
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ret |= VM_FAULT_WRITE;
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}
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rmap_flags |= RMAP_EXCLUSIVE;
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}
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