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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 11:36:49 +07:00
21fc61c73c
kmap() in page_follow_link_light() needed to go - allowing to hold an arbitrary number of kmaps for long is a great way to deadlocking the system. new helper (inode_nohighmem(inode)) needs to be used for pagecache symlinks inodes; done for all in-tree cases. page_follow_link_light() instrumented to yell about anything missed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
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* Symlink inode operations for Coda filesystem
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* Original version: (C) 1996 P. Braam and M. Callahan
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* Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
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*
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* Carnegie Mellon encourages users to contribute improvements to
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* the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/time.h>
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#include <linux/fs.h>
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#include <linux/stat.h>
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#include <linux/errno.h>
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#include <linux/pagemap.h>
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#include <linux/coda.h>
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#include <linux/coda_psdev.h>
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#include "coda_linux.h"
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static int coda_symlink_filler(struct file *file, struct page *page)
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{
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struct inode *inode = page->mapping->host;
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int error;
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struct coda_inode_info *cii;
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unsigned int len = PAGE_SIZE;
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char *p = page_address(page);
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cii = ITOC(inode);
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error = venus_readlink(inode->i_sb, &cii->c_fid, p, &len);
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if (error)
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goto fail;
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SetPageUptodate(page);
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unlock_page(page);
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return 0;
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fail:
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SetPageError(page);
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unlock_page(page);
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return error;
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}
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const struct address_space_operations coda_symlink_aops = {
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.readpage = coda_symlink_filler,
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};
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