Hi Kay,
There are new compile warnings show up in
tree: git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
driver-core-linus
head: eb02dac93708f581c99858a19162af8ca2b6bfcb
commit: eb02dac93708f581c99858a19162af8ca2b6bfcb [6/6] kmsg: /proc/kmsg -
support reading of partial log records
All warnings:
kernel/printk.c:220:15: warning: 'syslog_partial' defined but not used
[-Wunused-variable]
vim +220 kernel/printk.c
217 /* the next printk record to read by syslog(READ) or /proc/kmsg */
218 static u64 syslog_seq;
219 static u32 syslog_idx;
> 220 static size_t syslog_partial;
221
222 /* index and sequence number of the first record stored in the buffer */
223 static u64 log_first_seq;
The problem is, syslog_partial is defined outside of CONFIG_PRINTK and
used inside it:
static size_t syslog_partial;
#ifdef CONFIG_PRINTK
syslog_partial = 0;
skip = syslog_partial;
if (n - syslog_partial <= size) {
n -= syslog_partial;
syslog_partial = 0;
syslog_partial += n;
int do_syslog(int type, char __user *buf, int len, bool from_file)
syslog_partial = 0;
error -= syslog_partial;
return do_syslog(type, buf, len, SYSLOG_FROM_CALL);
#endif /* CONFIG_PRINTK */
---
0-DAY kernel build testing backend Open Source Technology Centre
Fengguang Wu <[email protected]> Intel Corporation
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