Eric Lee / smarc-ti-linux-kernel

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Commit 0b923606e75f1ab672e25b14ac039a1cdcfa382f

Authored by Peter Oberparleiter
Committed by Linus Torvalds
1 parent b99b87f70c
Exists in master and in 20 other branches dlt-processor-sdk-linux-03.00.00.04, newt-ti-linux-3.12.y, processor-sdk-linux-01.00.00, processor-sdk-linux-02.00.01, smarc-ti-linux-3.12.10, smarc-ti-linux-3.12.y, smarc-ti-linux-3.14.y, smarc-ti-linux-3.15.y, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04, ti-linux-3.12.y, ti-linux-3.14.y, ti-linux-3.15.y, ti-lsk-linux-4.1.y

seq_file: add function to write binary data 

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 <oberpar@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Li Wei <W.Li@Sun.COM>
Cc: Michael Ellerman <michaele@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Heiko Carstens <heicars2@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <mschwid2@linux.vnet.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Showing 2 changed files with 21 additions and 0 deletions Side-by-side Diff

... ... @@ -640,6 +640,26 @@
640 640 }
641 641 EXPORT_SYMBOL(seq_puts);
642 642  
  643 +/**
  644 + * seq_write - write arbitrary data to buffer
  645 + * @seq: seq_file identifying the buffer to which data should be written
  646 + * @data: data address
  647 + * @len: number of bytes
  648 + *
  649 + * Return 0 on success, non-zero otherwise.
  650 + */
  651 +int seq_write(struct seq_file *seq, const void *data, size_t len)
  652 +{
  653 + if (seq->count + len < seq->size) {
  654 + memcpy(seq->buf + seq->count, data, len);
  655 + seq->count += len;
  656 + return 0;
  657 + }
  658 + seq->count = seq->size;
  659 + return -1;
  660 +}
  661 +EXPORT_SYMBOL(seq_write);
  662 +
643 663 struct list_head *seq_list_start(struct list_head *head, loff_t pos)
644 664 {
645 665 struct list_head *lh;
include/linux/seq_file.h
Diff comments   View file @ 0b92360
... ... @@ -43,6 +43,7 @@
43 43 int seq_escape(struct seq_file *, const char *, const char *);
44 44 int seq_putc(struct seq_file *m, char c);
45 45 int seq_puts(struct seq_file *m, const char *s);
  46 +int seq_write(struct seq_file *seq, const void *data, size_t len);
46 47  
47 48 int seq_printf(struct seq_file *, const char *, ...)
48 49 __attribute__ ((format (printf,2,3)));