diff options
| author | Aboorva Devarajan <aboorvad@linux.ibm.com> | 2025-09-15 15:59:41 +0530 |
|---|---|---|
| committer | Madhavan Srinivasan <maddy@linux.ibm.com> | 2025-09-22 14:48:56 +0530 |
| commit | 2dc019ca39347f76891d34a992b67258078aa45d (patch) | |
| tree | c6a8c7f110029ab19b47d9847fbffb8c4c4a7bc8 /arch/powerpc/kernel | |
| parent | powerpc/32: Remove PAGE_KERNEL_TEXT to fix startup failure (diff) | |
| download | linux-2dc019ca39347f76891d34a992b67258078aa45d.tar.gz linux-2dc019ca39347f76891d34a992b67258078aa45d.zip | |
powerpc/time: Expose boot_tb via accessor
- Define accessor function get_boot_tb() to safely return boot_tb value,
this is only needed when running in SPLPAR environments, so the
accessor is built conditionally under CONFIG_PPC_SPLPAR.
- Tag boot_tb as __ro_after_init since it is written once at initialized
and never updated afterwards.
Signed-off-by: Aboorva Devarajan <aboorvad@linux.ibm.com>
Tested-by: Tejas Manhas <tejas05@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250915102947.26681-2-atrajeev@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/time.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 8224381c1dba..4bbeb8644d3d 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -137,7 +137,7 @@ EXPORT_SYMBOL_GPL(rtc_lock); static u64 tb_to_ns_scale __read_mostly; static unsigned tb_to_ns_shift __read_mostly; -static u64 boot_tb __read_mostly; +static u64 boot_tb __ro_after_init; extern struct timezone sys_tz; static long timezone_offset; @@ -639,6 +639,12 @@ notrace unsigned long long sched_clock(void) return mulhdu(get_tb() - boot_tb, tb_to_ns_scale) << tb_to_ns_shift; } +#ifdef CONFIG_PPC_SPLPAR +u64 get_boot_tb(void) +{ + return boot_tb; +} +#endif #ifdef CONFIG_PPC_PSERIES |