The following commit has been merged into the timers/core branch of tip:
Commit-ID: 0f532a789f1b24258043d0f856409d2ab974fb64
Gitweb: https://git.kernel.org/tip/0f532a789f1b24258043d0f856409d2ab974fb64
Author: Lakshmi Sowjanya D <lakshmi.sowjanya.d@xxxxxxxxx>
AuthorDate: Mon, 13 May 2024 16:08:09 +05:30
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Mon, 03 Jun 2024 11:18:51 +02:00
x86/tsc: Remove obsolete ART to TSC conversion functions
convert_art_to_tsc() and convert_art_ns_to_tsc() interfaces are no
longer required. The conversion is now handled by the core code.
Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240513103813.5666-9-lakshmi.sowjanya.d@xxxxxxxxx
---
arch/x86/include/asm/tsc.h | 3 +--
arch/x86/kernel/tsc.c | 60 +-------------------------------------
2 files changed, 63 deletions(-)
diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h
index 405efb3..94408a7 100644
--- a/arch/x86/include/asm/tsc.h
+++ b/arch/x86/include/asm/tsc.h
@@ -28,9 +28,6 @@ static inline cycles_t get_cycles(void)
}
#define get_cycles get_cycles
-extern struct system_counterval_t convert_art_to_tsc(u64 art);
-extern struct system_counterval_t convert_art_ns_to_tsc(u64 art_ns);
-
extern void tsc_early_init(void);
extern void tsc_init(void);
extern void mark_tsc_unstable(char *reason);
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index d1888db..d4462fb 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -1297,66 +1297,6 @@ int unsynchronized_tsc(void)
return 0;
}
-/*
- * Convert ART to TSC given numerator/denominator found in detect_art()
- */
-struct system_counterval_t convert_art_to_tsc(u64 art)
-{
- u64 tmp, res, rem;
-
- rem = do_div(art, art_base_clk.denominator);
-
- res = art * art_base_clk.numerator;
- tmp = rem * art_base_clk.numerator;
-
- do_div(tmp, art_base_clk.denominator);
- res += tmp + art_base_clk.offset;
-
- return (struct system_counterval_t) {
- .cs_id = have_art ? CSID_X86_TSC : CSID_GENERIC,
- .cycles = res,
- };
-}
-EXPORT_SYMBOL(convert_art_to_tsc);
-
-/**
- * convert_art_ns_to_tsc() - Convert ART in nanoseconds to TSC.
- * @art_ns: ART (Always Running Timer) in unit of nanoseconds
- *
- * PTM requires all timestamps to be in units of nanoseconds. When user
- * software requests a cross-timestamp, this function converts system timestamp
- * to TSC.
- *
- * This is valid when CPU feature flag X86_FEATURE_TSC_KNOWN_FREQ is set
- * indicating the tsc_khz is derived from CPUID[15H]. Drivers should check
- * that this flag is set before conversion to TSC is attempted.
- *
- * Return:
- * struct system_counterval_t - system counter value with the ID of the
- * corresponding clocksource:
- * cycles: System counter value
- * cs_id: The clocksource ID for validating comparability
- */
-
-struct system_counterval_t convert_art_ns_to_tsc(u64 art_ns)
-{
- u64 tmp, res, rem;
-
- rem = do_div(art_ns, USEC_PER_SEC);
-
- res = art_ns * tsc_khz;
- tmp = rem * tsc_khz;
-
- do_div(tmp, USEC_PER_SEC);
- res += tmp;
-
- return (struct system_counterval_t) {
- .cs_id = have_art ? CSID_X86_TSC : CSID_GENERIC,
- .cycles = res,
- };
-}
-EXPORT_SYMBOL(convert_art_ns_to_tsc);
-
static void tsc_refine_calibration_work(struct work_struct *work);
static DECLARE_DELAYED_WORK(tsc_irqwork, tsc_refine_calibration_work);
/**
|