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fs: export generic_file_buffered_read()

Export generic_file_buffered_read() to be used to supplement incomplete direct reads.

Goldwyn Rodrigues committed 7 years ago

Commit d85dc2e1 parent bbcd1f42 files · +4 −1Browse files

Unified · Split

2 files
  1. include/linux/fs.h +2 −0
  2. mm/filemap.c +2 −1
include/linux/fs.h+2−0
@@ -3124,6 +3124,8 @@ extern int generic_file_rw_checks(struct file *file_in, struct file *file_out); · 3123 unmodified lines
3124extern int generic_copy_file_checks(struct file *file_in, loff_t pos_in,3124extern int generic_copy_file_checks(struct file *file_in, loff_t pos_in,
3125 struct file *file_out, loff_t pos_out,3125 struct file *file_out, loff_t pos_out,
3126 size_t *count, unsigned int flags);3126 size_t *count, unsigned int flags);
3127extern ssize_t generic_file_buffered_read(struct kiocb *iocb,
3128 struct iov_iter *to, ssize_t already_read);
3127extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *);3129extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *);
3128extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *);3130extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *);
3129extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);3131extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);
mm/filemap.c+2−1
@@ -1991,7 +1991,7 @@ static void shrink_readahead_size_eio(struct file_ra_state *ra) · 1990 unmodified lines
1991 * * total number of bytes copied, including those the were already @written1991 * * total number of bytes copied, including those the were already @written
1992 * * negative error code if nothing was copied1992 * * negative error code if nothing was copied
1993 */1993 */
1994static ssize_t generic_file_buffered_read(struct kiocb *iocb,1994ssize_t generic_file_buffered_read(struct kiocb *iocb,
1995 struct iov_iter *iter, ssize_t written)1995 struct iov_iter *iter, ssize_t written)
1996{1996{
1997 struct file *filp = iocb->ki_filp;1997 struct file *filp = iocb->ki_filp;
@@ -2243,6 +2243,7 @@ out: · 245 unmodified lines
2243 file_accessed(filp);2243 file_accessed(filp);
2244 return written ? written : error;2244 return written ? written : error;
2245}2245}
2246EXPORT_SYMBOL_GPL(generic_file_buffered_read);
2246 2247
2247/**2248/**
2248 * generic_file_read_iter - generic filesystem read routine2249 * generic_file_read_iter - generic filesystem read routine