wrapper: trace-clock: remove compatibility code

[lttng-modules.git] / wrapper / trace-clock.h

diff --git a/wrapper/trace-clock.h b/wrapper/trace-clock.h
index a98f034e674d92ef715d58d1581b596df6e68617..df03c0fc46d047f54cfebf4b99a4a892c45ced9d 100644 (file)
--- a/wrapper/trace-clock.h
+++ b/wrapper/trace-clock.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
  *
  * wrapper/trace-clock.h
  *
@@ -21,32 +21,16 @@
 #include <linux/hrtimer.h>
 #include <linux/percpu.h>
 #include <linux/version.h>
+#include <linux/percpu-defs.h>
 #include <asm/local.h>
 #include <lttng-kernel-version.h>
 #include <lttng-clock.h>
 #include <wrapper/compiler.h>
-#include <wrapper/percpu-defs.h>
 #include <wrapper/random.h>
-
-#if ((LTTNG_KERNEL_RANGE(3,10,0, 3,10,14) && !LTTNG_RHEL_KERNEL_RANGE(3,10,0,123,0,0, 3,10,14,0,0,0)) \
-       || LTTNG_KERNEL_RANGE(3,11,0, 3,11,3))
-#error "Linux kernels 3.10 and 3.11 introduce a deadlock in the timekeeping subsystem. Fixed by commit 7bd36014460f793c19e7d6c94dab67b0afcfcb7f \"timekeeping: Fix HRTICK related deadlock from ntp lock changes\" in Linux."
-#endif
+#include <blacklist/timekeeping.h>
 
 extern struct lttng_trace_clock *lttng_trace_clock;
 
-/*
- * Upstream Linux commit 27727df240c7 ("Avoid taking lock in NMI path with
- * CONFIG_DEBUG_TIMEKEEPING") introduces a buggy ktime_get_mono_fast_ns().
- * This is fixed by patch "timekeeping: Fix __ktime_get_fast_ns() regression".
- */
-#if (LTTNG_KERNEL_RANGE(4,8,0, 4,8,2) \
-       || LTTNG_KERNEL_RANGE(4,7,4, 4,7,8) \
-       || LTTNG_KERNEL_RANGE(4,4,20, 4,4,25) \
-       || LTTNG_KERNEL_RANGE(4,1,32, 4,1,35))
-#define LTTNG_CLOCK_NMI_SAFE_BROKEN
-#endif
-
 /*
  * We need clock values to be monotonically increasing per-cpu, which is
  * not strictly guaranteed by ktime_get_mono_fast_ns(). It is
@@ -55,9 +39,7 @@ extern struct lttng_trace_clock *lttng_trace_clock;
  * this feature on 64-bit architectures.
  */
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0) \
-       && BITS_PER_LONG == 64 \
-       && !defined(LTTNG_CLOCK_NMI_SAFE_BROKEN))
+#if BITS_PER_LONG == 64
 #define LTTNG_USE_NMI_SAFE_CLOCK
 #endif
 
@@ -75,7 +57,7 @@ static inline u64 trace_clock_monotonic_wrapper(void)
 
        /* Use fast nmi-safe monotonic clock provided by the Linux kernel. */
        preempt_disable();
-       last_tsc_ptr = lttng_this_cpu_ptr(&lttng_last_tsc);
+       last_tsc_ptr = this_cpu_ptr(&lttng_last_tsc);
        last = *last_tsc_ptr;
        /*
         * Read "last" before "now". It is not strictly required, but it ensures