Revision 4ffd96c9621fcec3b84f3f997e036cc7077ec465 authored by Linus Torvalds on 19 May 2023, 18:05:42 UTC, committed by Linus Torvalds on 19 May 2023, 18:05:42 UTC
Pull arm64 fixes from Will Deacon: "A mixture of compiler/static checker resolutions and a couple of MTE fixes: - Avoid erroneously marking untagged pages with PG_mte_tagged - Always reset KASAN tags for destination page in copy_page() - Mark PMU header functions 'static inline' - Fix some sparse warnings due to missing casts" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: mte: Do not set PG_mte_tagged if tags were not initialized arm64: Also reset KASAN tag if page is not PG_mte_tagged arm64: perf: Mark all accessor functions inline ARM: perf: Mark all accessor functions inline arm64: vdso: Pass (void *) to virt_to_page() arm64/mm: mark private VM_FAULT_X defines as vm_fault_t
symlink.c
// SPDX-License-Identifier: GPL-2.0
/*
* symlink.c
*
* Copyright (c) 1999 Al Smith
*
* Portions derived from work (c) 1995,1996 Christian Vogelgsang.
*/
#include <linux/string.h>
#include <linux/pagemap.h>
#include <linux/buffer_head.h>
#include "efs.h"
static int efs_symlink_read_folio(struct file *file, struct folio *folio)
{
struct page *page = &folio->page;
char *link = page_address(page);
struct buffer_head * bh;
struct inode * inode = page->mapping->host;
efs_block_t size = inode->i_size;
int err;
err = -ENAMETOOLONG;
if (size > 2 * EFS_BLOCKSIZE)
goto fail;
/* read first 512 bytes of link target */
err = -EIO;
bh = sb_bread(inode->i_sb, efs_bmap(inode, 0));
if (!bh)
goto fail;
memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size);
brelse(bh);
if (size > EFS_BLOCKSIZE) {
bh = sb_bread(inode->i_sb, efs_bmap(inode, 1));
if (!bh)
goto fail;
memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE);
brelse(bh);
}
link[size] = '\0';
SetPageUptodate(page);
unlock_page(page);
return 0;
fail:
SetPageError(page);
unlock_page(page);
return err;
}
const struct address_space_operations efs_symlink_aops = {
.read_folio = efs_symlink_read_folio
};
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