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seq_file: add function to write binary data

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seq_write() can be used to construct seq_files containing arbitrary data.
Required by the gcov-profiling interface to synthesize binary profiling
data files.

Signed-off-by: Peter Oberparleiter <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Huang Ying <[email protected]>
Cc: Li Wei <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Rusty Russell <[email protected]>
Cc: WANG Cong <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: Jeff Dike <[email protected]>
Cc: Al Viro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Peter Oberparleiter 2009-06-17 16:28:05 -07:00 • committed by Linus Torvalds
commit 0b923606e7
2 changed files with 21 additions and 0 deletions
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20
fs/seq_file.c
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@ -640,6 +640,26 @@ int seq_puts(struct seq_file *m, const char *s)
}
EXPORT_SYMBOL(seq_puts);
/**
* seq_write - write arbitrary data to buffer
* @seq: seq_file identifying the buffer to which data should be written
* @data: data address
* @len: number of bytes
*
* Return 0 on success, non-zero otherwise.
*/
int seq_write(struct seq_file *seq, const void *data, size_t len)
{
if (seq->count + len < seq->size) {
memcpy(seq->buf + seq->count, data, len);
seq->count += len;
return 0;
}
seq->count = seq->size;
return -1;
}
EXPORT_SYMBOL(seq_write);
struct list_head *seq_list_start(struct list_head *head, loff_t pos)
{
struct list_head *lh;