X-Git-Url: http://git.liburcu.org/?p=lttng-modules.git;a=blobdiff_plain;f=lttng-context-preemptible.c;h=328f2a43764ea383343270f28eeb862e6e91d943;hp=70534147fad58ff0c5779e3a81b2f08accd5bd27;hb=HEAD;hpb=39e088f37e7cb43f35af05b81bf1e23542623802

diff --git a/lttng-context-preemptible.c b/lttng-context-preemptible.c
deleted file mode 100644
index 70534147..00000000
--- a/lttng-context-preemptible.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * lttng-context-preemptible.c
- *
- * LTTng preemptible context.
- *
- * Copyright (C) 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#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.basic.integer.size = sizeof(uint8_t) * CHAR_BIT;
-	field->event_field.type.u.basic.integer.alignment = lttng_alignof(uint8_t) * CHAR_BIT;
-	field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(uint8_t);
-	field->event_field.type.u.basic.integer.reverse_byte_order = 0;
-	field->event_field.type.u.basic.integer.base = 10;
-	field->event_field.type.u.basic.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);