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powerpc/rtas: Make timestamp related code y2038-safe 

While we are here, let us make timestamp related code y2038-safe.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hifive-unleashed-5.1
Hari Bathini 2015-02-06 01:07:17 +05:30 committed by Michael Ellerman
parent f7618299b4
commit e4a9616c54
3 changed files with 10 additions and 9 deletions
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3
arch/powerpc/include/asm/rtas.h
View File

@ -4,6 +4,7 @@
#include <linux/spinlock.h>
#include <asm/page.h>
#include <linux/time.h>
/*
* Definitions for talking to the RTAS on CHRP machines.
@ -343,7 +344,7 @@ extern int early_init_dt_scan_rtas(unsigned long node,
extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
#ifdef CONFIG_PPC_PSERIES
extern unsigned long last_rtas_event;
extern time64_t last_rtas_event;
extern int clobbering_unread_rtas_event(void);
extern int pseries_devicetree_update(s32 scope);
extern void post_mobility_fixup(void);

6
arch/powerpc/kernel/nvram_64.c
View File

@ -376,7 +376,7 @@ static int zip_oops(size_t text_len)
}
oops_hdr->version = cpu_to_be16(OOPS_HDR_VERSION);
oops_hdr->report_length = cpu_to_be16(zipped_len);
oops_hdr->timestamp = cpu_to_be64(get_seconds());
oops_hdr->timestamp = cpu_to_be64(ktime_get_real_seconds());
return 0;
}
@ -423,7 +423,7 @@ static int nvram_pstore_write(enum pstore_type_id type,
oops_hdr->version = cpu_to_be16(OOPS_HDR_VERSION);
oops_hdr->report_length = cpu_to_be16(size);
oops_hdr->timestamp = cpu_to_be64(get_seconds());
oops_hdr->timestamp = cpu_to_be64(ktime_get_real_seconds());
if (compressed)
err_type = ERR_TYPE_KERNEL_PANIC_GZ;
@ -721,7 +721,7 @@ static void oops_to_nvram(struct kmsg_dumper *dumper,
err_type = ERR_TYPE_KERNEL_PANIC;
oops_hdr->version = cpu_to_be16(OOPS_HDR_VERSION);
oops_hdr->report_length = cpu_to_be16(text_len);
oops_hdr->timestamp = cpu_to_be64(get_seconds());
oops_hdr->timestamp = cpu_to_be64(ktime_get_real_seconds());
}
(void) nvram_write_os_partition(&oops_log_partition, oops_buf,

10
arch/powerpc/platforms/pseries/nvram.c
View File

@ -36,10 +36,10 @@ static DEFINE_SPINLOCK(nvram_lock);
/* See clobbering_unread_rtas_event() */
#define NVRAM_RTAS_READ_TIMEOUT 5 /* seconds */
static unsigned long last_unread_rtas_event; /* timestamp */
static time64_t last_unread_rtas_event; /* timestamp */
#ifdef CONFIG_PSTORE
unsigned long last_rtas_event;
time64_t last_rtas_event;
#endif
static ssize_t pSeries_nvram_read(char *buf, size_t count, loff_t *index)
@ -144,9 +144,9 @@ int nvram_write_error_log(char * buff, int length,
int rc = nvram_write_os_partition(&rtas_log_partition, buff, length,
err_type, error_log_cnt);
if (!rc) {
last_unread_rtas_event = get_seconds();
last_unread_rtas_event = ktime_get_real_seconds();
#ifdef CONFIG_PSTORE
last_rtas_event = get_seconds();
last_rtas_event = ktime_get_real_seconds();
#endif
}
@ -200,7 +200,7 @@ int clobbering_unread_rtas_event(void)
{
return (oops_log_partition.index == rtas_log_partition.index
&& last_unread_rtas_event
&& get_seconds() - last_unread_rtas_event <=
&& ktime_get_real_seconds() - last_unread_rtas_event <=
NVRAM_RTAS_READ_TIMEOUT);
}