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>

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index d1bd001..c3c99eb 100644 (file)
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -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);

diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index 293da88..1e703f8 100644 (file)
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -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,

diff --git a/arch/powerpc/platforms/pseries/nvram.c b/arch/powerpc/platforms/pseries/nvram.c
index 533807e..9f81841 100644 (file)
--- a/arch/powerpc/platforms/pseries/nvram.c
+++ b/arch/powerpc/platforms/pseries/nvram.c
@@ -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);
 }