--- fs/seq_file.c

+++ fs/seq_file.c

@@ -642,6 +642,39 @@ int seq_puts(struct seq_file *m, const c

}

EXPORT_SYMBOL(seq_puts);

+/*

+ * A helper routine for putting decimal numbers without rich format of printf().

+ * only 'unsigned long long' is supported.

+ * This routine will put one byte delimiter + number into seq_file.

+ * This routine is very quick when you show lots of numbers.

+ * In usual cases, it will be better to use seq_printf(). It's easier to read.

+ */

+int seq_put_decimal_ull(struct seq_file *m, char delimiter,

+ unsigned long long num)

+{

+ int len;

+

+ if (m->count + 2 >= m->size) /* we'll write 2 bytes at least */

+ goto overflow;

+

+ m->buf[m->count++] = delimiter;

+

+ if (num < 10) {

+ m->buf[m->count++] = num + '0';

+ return 0;

+ }

+

+ len = num_to_str(m->buf + m->count, m->size - m->count, num);

+ if (!len)

+ goto overflow;

+ m->count += len;

+ return 0;

+overflow:

+ m->count = m->size;

+ return -1;

+}

+EXPORT_SYMBOL(seq_put_decimal_ull);

+

/**

* seq_write - write arbitrary data to buffer

* @seq: seq_file identifying the buffer to which data should be written