[net-next:master 122/152] drivers/ptp/ptp_chardev.c:36 ptp_ioctl() warn: 'sysoff' puts 832 bytes on stack
From: Yuanhan Liu <hidden>
Date: 2012-11-02 02:06:26
Hi Richard,
_just_ FYI and let you aware of it, there are new smatch warnings show up in
tree: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head: b77bc2069d1e437d5a1a71bb5cfcf4556ee40015
commit: 215b13dd288c2e1e4461c1530a801f5f83e8cd90 [122/152] ptp: add an ioctl to compare PHC time with system time
+ drivers/ptp/ptp_chardev.c:36 ptp_ioctl() warn: 'sysoff' puts 832 bytes on stack
drivers/ptp/ptp_chardev.c:144 ptp_read() warn: 'event' puts 960 bytes on stack
vim +36 +/sysoff drivers/ptp/ptp_chardev.c
d94ba80e Richard Cochran 2011-04-22 20 #include <linux/module.h>
d94ba80e Richard Cochran 2011-04-22 21 #include <linux/posix-clock.h>
d94ba80e Richard Cochran 2011-04-22 22 #include <linux/poll.h>
d94ba80e Richard Cochran 2011-04-22 23 #include <linux/sched.h>
d94ba80e Richard Cochran 2011-04-22 24
d94ba80e Richard Cochran 2011-04-22 25 #include "ptp_private.h"
d94ba80e Richard Cochran 2011-04-22 26
d94ba80e Richard Cochran 2011-04-22 27 int ptp_open(struct posix_clock *pc, fmode_t fmode)
d94ba80e Richard Cochran 2011-04-22 28 {
d94ba80e Richard Cochran 2011-04-22 29 return 0;
d94ba80e Richard Cochran 2011-04-22 30 }
d94ba80e Richard Cochran 2011-04-22 31
d94ba80e Richard Cochran 2011-04-22 32 long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
d94ba80e Richard Cochran 2011-04-22 33 {
d94ba80e Richard Cochran 2011-04-22 34 struct ptp_clock_caps caps;
d94ba80e Richard Cochran 2011-04-22 35 struct ptp_clock_request req;
215b13dd Richard Cochran 2012-10-31 @36 struct ptp_sys_offset sysoff;
d94ba80e Richard Cochran 2011-04-22 37 struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
d94ba80e Richard Cochran 2011-04-22 38 struct ptp_clock_info *ops = ptp->info;
215b13dd Richard Cochran 2012-10-31 39 struct ptp_clock_time *pct;
215b13dd Richard Cochran 2012-10-31 40 struct timespec ts;
d94ba80e Richard Cochran 2011-04-22 41 int enable, err = 0;
215b13dd Richard Cochran 2012-10-31 42 unsigned int i;
d94ba80e Richard Cochran 2011-04-22 43
d94ba80e Richard Cochran 2011-04-22 44 switch (cmd) {
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