diff options
Diffstat (limited to 'drivers/base/power/trace.c')
| -rw-r--r-- | drivers/base/power/trace.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c index a97f33d0c59f..94665037f4a3 100644 --- a/drivers/base/power/trace.c +++ b/drivers/base/power/trace.c @@ -13,6 +13,7 @@ #include <linux/export.h> #include <linux/rtc.h> #include <linux/suspend.h> +#include <linux/init.h> #include <linux/mc146818rtc.h> @@ -165,6 +166,9 @@ void generate_pm_trace(const void *tracedata, unsigned int user) const char *file = *(const char **)(tracedata + 2); unsigned int user_hash_value, file_hash_value; + if (!x86_platform.legacy.rtc) + return; + user_hash_value = user % USERHASH; file_hash_value = hash_string(lineno, file, FILEHASH); set_magic_time(user_hash_value, file_hash_value, dev_hash_value); @@ -267,6 +271,9 @@ static struct notifier_block pm_trace_nb = { static int __init early_resume_init(void) { + if (!x86_platform.legacy.rtc) + return 0; + hash_value_early_read = read_magic_time(); register_pm_notifier(&pm_trace_nb); return 0; @@ -277,6 +284,9 @@ static int __init late_resume_init(void) unsigned int val = hash_value_early_read; unsigned int user, file, dev; + if (!x86_platform.legacy.rtc) + return 0; + user = val % USERHASH; val = val / USERHASH; file = val % FILEHASH; |