c5ef1c42c5
Many struct inode_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
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* linux/fs/sysv/file.c
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*
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* minix/file.c
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* coh/file.c
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* Copyright (C) 1993 Pascal Haible, Bruno Haible
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*
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* sysv/file.c
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* Copyright (C) 1993 Bruno Haible
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*
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* SystemV/Coherent regular file handling primitives
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*/
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#include "sysv.h"
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/*
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* We have mostly NULLs here: the current defaults are OK for
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* the coh filesystem.
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*/
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const struct file_operations sysv_file_operations = {
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.llseek = generic_file_llseek,
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.read = do_sync_read,
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.aio_read = generic_file_aio_read,
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.write = do_sync_write,
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.aio_write = generic_file_aio_write,
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.mmap = generic_file_mmap,
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.fsync = sysv_sync_file,
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.sendfile = generic_file_sendfile,
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};
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const struct inode_operations sysv_file_inode_operations = {
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.truncate = sysv_truncate,
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.getattr = sysv_getattr,
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};
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int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
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{
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struct inode *inode = dentry->d_inode;
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int err;
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err = sync_mapping_buffers(inode->i_mapping);
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if (!(inode->i_state & I_DIRTY))
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return err;
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if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
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return err;
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err |= sysv_sync_inode(inode);
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return err ? -EIO : 0;
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}
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