X-Git-Url: http://git.liburcu.org/?p=lttng-modules.git;a=blobdiff_plain;f=lttng-context-preemptible.c;h=328f2a43764ea383343270f28eeb862e6e91d943;hp=6a40f03a266bf44d66fa474c8ef84db26ec9a515;hb=HEAD;hpb=ceabb767180e064629b5a9ab4ed14449da864763

diff --git a/lttng-context-preemptible.c b/lttng-context-preemptible.c
deleted file mode 100644
index 6a40f03a..00000000
--- a/lttng-context-preemptible.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
- *
- * lttng-context-preemptible.c
- *
- * LTTng preemptible context.
- *
- * Copyright (C) 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/irqflags.h>
-#include <lttng-events.h>
-#include <wrapper/ringbuffer/frontend_types.h>
-#include <wrapper/vmalloc.h>
-#include <lttng-tracer.h>
-
-/*
- * We nest twice in preempt disabling within LTTng: one nesting is done
- * by the instrumentation (tracepoint, kprobes, kretprobes, syscall
- * tracepoint), and the second is within the lib ring buffer
- * lib_ring_buffer_get_cpu().
- */
-#define LTTNG_PREEMPT_DISABLE_NESTING	2
-
-static
-size_t preemptible_get_size(size_t offset)
-{
-	size_t size = 0;
-
-	size += lib_ring_buffer_align(offset, lttng_alignof(uint8_t));
-	size += sizeof(uint8_t);
-	return size;
-}
-
-static
-void preemptible_record(struct lttng_ctx_field *field,
-		struct lib_ring_buffer_ctx *ctx,
-		struct lttng_channel *chan)
-{
-	int pc = preempt_count();
-	uint8_t preemptible = 0;
-
-	WARN_ON_ONCE(pc < LTTNG_PREEMPT_DISABLE_NESTING);
-	if (pc == LTTNG_PREEMPT_DISABLE_NESTING)
-		preemptible = 1;
-	lib_ring_buffer_align_ctx(ctx, lttng_alignof(preemptible));
-	chan->ops->event_write(ctx, &preemptible, sizeof(preemptible));
-}
-
-static
-void preemptible_get_value(struct lttng_ctx_field *field,
-		struct lttng_probe_ctx *lttng_probe_ctx,
-		union lttng_ctx_value *value)
-{
-	int pc = preempt_count();
-
-	WARN_ON_ONCE(pc < LTTNG_PREEMPT_DISABLE_NESTING);
-	if (pc == LTTNG_PREEMPT_DISABLE_NESTING)
-		value->s64 = 1;
-	else
-		value->s64 = 0;
-}
-
-int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx)
-{
-	struct lttng_ctx_field *field;
-
-	field = lttng_append_context(ctx);
-	if (!field)
-		return -ENOMEM;
-	if (lttng_find_context(*ctx, "preemptible")) {
-		lttng_remove_context_field(ctx, field);
-		return -EEXIST;
-	}
-	field->event_field.name = "preemptible";
-	field->event_field.type.atype = atype_integer;
-	field->event_field.type.u.integer.size = sizeof(uint8_t) * CHAR_BIT;
-	field->event_field.type.u.integer.alignment = lttng_alignof(uint8_t) * CHAR_BIT;
-	field->event_field.type.u.integer.signedness = lttng_is_signed_type(uint8_t);
-	field->event_field.type.u.integer.reverse_byte_order = 0;
-	field->event_field.type.u.integer.base = 10;
-	field->event_field.type.u.integer.encoding = lttng_encode_none;
-	field->get_size = preemptible_get_size;
-	field->record = preemptible_record;
-	field->get_value = preemptible_get_value;
-	lttng_context_update(*ctx);
-	wrapper_vmalloc_sync_all();
-	return 0;
-}
-EXPORT_SYMBOL_GPL(lttng_add_preemptible_to_ctx);