From: Hugh Dickins Date: Sun, 30 Oct 2005 01:16:31 +0000 (-0700) Subject: [PATCH] mm: xip_unmap ZERO_PAGE fix X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=67b02f119df50ffad5a4e9e53ea4c896535862cd;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git [PATCH] mm: xip_unmap ZERO_PAGE fix Small fix to the PageReserved patch: the mips ZERO_PAGE(address) depends on address, so __xip_unmap is wrong to initialize page with that before address is initialized; and in fact must re-evaluate it each iteration. Signed-off-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c index 9354ee279b13..4e74ad60339a 100644 --- a/mm/filemap_xip.c +++ b/mm/filemap_xip.c @@ -174,7 +174,7 @@ __xip_unmap (struct address_space * mapping, unsigned long address; pte_t *pte; pte_t pteval; - struct page *page = ZERO_PAGE(address); + struct page *page; spin_lock(&mapping->i_mmap_lock); vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { @@ -182,6 +182,7 @@ __xip_unmap (struct address_space * mapping, address = vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT); BUG_ON(address < vma->vm_start || address >= vma->vm_end); + page = ZERO_PAGE(address); /* * We need the page_table_lock to protect us from page faults, * munmap, fork, etc...