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lttng-modules: backport patches to fix build against 5.12+ kernel
Add the following patches from stable-2.12 branch of lttng repository to fix errors when building lttng-modules against 5.12+ kernel since they are not present on the release 2.12.5: - 17cd2dc9 fix: block: add a disk_uevent helper (v5.12) - 127135b6 fix backport: block: add a disk_uevent helper (v5.12) - 853d5903 fix: mm, tracing: kfree event name mismatching with provider kmem (v5.12) (From OE-Core rev: 86bcab9e9f4ee5e06f7db8c75d4b983fd2be59d2) Signed-off-by: Vinicius Aquino <vinicius.aquino@ossystems.com.br> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> (cherry picked from commit 2538ba2b3490e3599d9ccd637aa8486ea428f1b0) Signed-off-by: Anuj Mittal <anuj.mittal@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Vinícius Ossanes Aquino
committed by
Richard Purdie
Richard Purdie
parent
337fa11044
commit
900aae50c9
@@ -0,0 +1,305 @@
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From 17cd2dc91cb82ed342b0da699f2b1a70c1bf6a03 Mon Sep 17 00:00:00 2001
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From: Michael Jeanson <mjeanson@efficios.com>
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Date: Mon, 15 Mar 2021 14:54:02 -0400
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Subject: [PATCH 2/4] fix: block: add a disk_uevent helper (v5.12)
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See upstream commit:
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commit bc359d03c7ec1bf3b86d03bafaf6bbb21e6414fd
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Author: Christoph Hellwig <hch@lst.de>
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Date: Sun Jan 24 11:02:39 2021 +0100
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block: add a disk_uevent helper
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Add a helper to call kobject_uevent for the disk and all partitions, and
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unexport the disk_part_iter_* helpers that are now only used in the core
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block code.
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Upstream-status: Backport [2.12.6]
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Change-Id: If6e8797049642ab382d5699660ee1dd734e92c90
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Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
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Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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---
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Makefile | 1 +
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lttng-statedump-impl.c | 34 +++++++++----
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src/wrapper/genhd.c | 111 +++++++++++++++++++++++++++++++++++++++++
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wrapper/genhd.h | 62 +++++++++++++++++++++++
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4 files changed, 198 insertions(+), 10 deletions(-)
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create mode 100644 src/wrapper/genhd.c
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diff --git a/Makefile b/Makefile
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index a9aff3f1..34043cfb 100644
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--- a/Makefile
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+++ b/Makefile
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@@ -80,6 +80,7 @@ ifneq ($(KERNELRELEASE),)
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wrapper/kallsyms.o \
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wrapper/irqdesc.o \
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wrapper/fdtable.o \
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+ wrapper/genhd.o \
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lttng-wrapper-impl.o
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ifneq ($(CONFIG_HAVE_SYSCALL_TRACEPOINTS),)
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diff --git a/lttng-statedump-impl.c b/lttng-statedump-impl.c
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index 60b937c9..5511c7e8 100644
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--- a/lttng-statedump-impl.c
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+++ b/lttng-statedump-impl.c
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@@ -250,13 +250,17 @@ int lttng_enumerate_block_devices(struct lttng_session *session)
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struct device_type *ptr_disk_type;
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struct class_dev_iter iter;
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struct device *dev;
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+ int ret = 0;
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ptr_block_class = wrapper_get_block_class();
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- if (!ptr_block_class)
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- return -ENOSYS;
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+ if (!ptr_block_class) {
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+ ret = -ENOSYS;
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+ goto end;
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+ }
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ptr_disk_type = wrapper_get_disk_type();
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if (!ptr_disk_type) {
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- return -ENOSYS;
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+ ret = -ENOSYS;
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+ goto end;
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}
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class_dev_iter_init(&iter, ptr_block_class, NULL, ptr_disk_type);
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while ((dev = class_dev_iter_next(&iter))) {
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@@ -272,22 +276,32 @@ int lttng_enumerate_block_devices(struct lttng_session *session)
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(disk->flags & GENHD_FL_SUPPRESS_PARTITION_INFO))
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continue;
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- disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
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- while ((part = disk_part_iter_next(&piter))) {
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+ /*
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+ * The original 'disk_part_iter_init' returns void, but our
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+ * wrapper can fail to lookup the original symbol.
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+ */
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+ if (wrapper_disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0) < 0) {
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+ ret = -ENOSYS;
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+ goto iter_exit;
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+ }
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+
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+ while ((part = wrapper_disk_part_iter_next(&piter))) {
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char name_buf[BDEVNAME_SIZE];
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if (lttng_get_part_name(disk, part, name_buf) == -ENOSYS) {
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- disk_part_iter_exit(&piter);
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- class_dev_iter_exit(&iter);
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- return -ENOSYS;
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+ wrapper_disk_part_iter_exit(&piter);
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+ ret = -ENOSYS;
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+ goto iter_exit;
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}
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trace_lttng_statedump_block_device(session,
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lttng_get_part_devt(part), name_buf);
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}
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- disk_part_iter_exit(&piter);
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+ wrapper_disk_part_iter_exit(&piter);
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}
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+iter_exit:
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class_dev_iter_exit(&iter);
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- return 0;
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+end:
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+ return ret;
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}
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#ifdef CONFIG_INET
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diff --git a/src/wrapper/genhd.c b/src/wrapper/genhd.c
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new file mode 100644
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index 00000000..a5a6c410
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--- /dev/null
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+++ b/src/wrapper/genhd.c
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@@ -0,0 +1,111 @@
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+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
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+ *
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+ * wrapper/genhd.c
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+ *
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+ * Wrapper around disk_part_iter_(init|next|exit). Using KALLSYMS to get the
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+ * addresses when available, else we need to have a kernel that exports this
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+ * function to GPL modules. This export was removed in 5.12.
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+ *
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+ * Copyright (C) 2021 Michael Jeanson <mjeanson@efficios.com>
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+ */
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+
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+#include <lttng/kernel-version.h>
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+#include <linux/module.h>
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+#include <wrapper/genhd.h>
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+
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+#if (defined(CONFIG_KALLSYMS) && \
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+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,12,0)))
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+
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+#include <wrapper/kallsyms.h>
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+
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+static
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+void (*disk_part_iter_init_sym)(struct disk_part_iter *piter, struct gendisk *disk,
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+ unsigned int flags);
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+
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+static
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+LTTNG_DISK_PART_TYPE *(*disk_part_iter_next_sym)(struct disk_part_iter *piter);
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+
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+static
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+void (*disk_part_iter_exit_sym)(struct disk_part_iter *piter);
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+
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+/*
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+ * This wrapper has an 'int' return type instead of the original 'void', to be
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+ * able to report the symbol lookup failure to the caller.
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+ *
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+ * Return 0 on success, -1 on error.
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+ */
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+int wrapper_disk_part_iter_init(struct disk_part_iter *piter, struct gendisk *disk,
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+ unsigned int flags)
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+{
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+ if (!disk_part_iter_init_sym)
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+ disk_part_iter_init_sym = (void *) kallsyms_lookup_funcptr("disk_part_iter_init");
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+
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+ if (disk_part_iter_init_sym) {
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+ disk_part_iter_init_sym(piter, disk, flags);
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+ } else {
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+ printk_once(KERN_WARNING "LTTng: disk_part_iter_init symbol lookup failed.\n");
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+ return -1;
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+ }
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(wrapper_disk_part_iter_init);
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+
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+LTTNG_DISK_PART_TYPE *wrapper_disk_part_iter_next(struct disk_part_iter *piter)
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+{
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+ if (!disk_part_iter_next_sym)
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+ disk_part_iter_next_sym = (void *) kallsyms_lookup_funcptr("disk_part_iter_next");
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+
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+ if (disk_part_iter_next_sym) {
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+ return disk_part_iter_next_sym(piter);
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+ } else {
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+ printk_once(KERN_WARNING "LTTng: disk_part_iter_next symbol lookup failed.\n");
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+ return NULL;
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+ }
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+}
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+EXPORT_SYMBOL_GPL(wrapper_disk_part_iter_next);
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+
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+/*
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+ * We don't return an error on symbol lookup failure here because there is
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+ * nothing the caller can do to cleanup the iterator.
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+ */
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+void wrapper_disk_part_iter_exit(struct disk_part_iter *piter)
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+{
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+ if (!disk_part_iter_exit_sym)
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+ disk_part_iter_exit_sym = (void *) kallsyms_lookup_funcptr("disk_part_iter_exit");
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+
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+ if (disk_part_iter_exit_sym) {
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+ disk_part_iter_exit_sym(piter);
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+ } else {
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+ printk_once(KERN_WARNING "LTTng: disk_part_iter_exit symbol lookup failed.\n");
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+ }
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+}
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+EXPORT_SYMBOL_GPL(wrapper_disk_part_iter_exit);
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+
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+#else
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+
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+/*
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+ * This wrapper has an 'int' return type instead of the original 'void', so the
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+ * kallsyms variant can report the symbol lookup failure to the caller.
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+ *
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+ * This variant always succeeds and returns 0.
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+ */
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+int wrapper_disk_part_iter_init(struct disk_part_iter *piter, struct gendisk *disk,
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+ unsigned int flags)
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+{
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+ disk_part_iter_init(piter, disk, flags);
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(wrapper_disk_part_iter_init);
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+
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+LTTNG_DISK_PART_TYPE *wrapper_disk_part_iter_next(struct disk_part_iter *piter)
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+{
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+ return disk_part_iter_next(piter);
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+}
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+EXPORT_SYMBOL_GPL(wrapper_disk_part_iter_next);
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+
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+void wrapper_disk_part_iter_exit(struct disk_part_iter *piter)
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+{
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+ disk_part_iter_exit(piter);
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+}
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+EXPORT_SYMBOL_GPL(wrapper_disk_part_iter_exit);
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+#endif
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diff --git a/wrapper/genhd.h b/wrapper/genhd.h
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index 98feb57b..6bae239d 100644
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--- a/wrapper/genhd.h
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+++ b/wrapper/genhd.h
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@@ -13,6 +13,13 @@
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#define _LTTNG_WRAPPER_GENHD_H
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#include <linux/genhd.h>
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+#include <lttng/kernel-version.h>
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+
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+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
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+#define LTTNG_DISK_PART_TYPE struct block_device
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+#else
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+#define LTTNG_DISK_PART_TYPE struct hd_struct
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+#endif
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#ifdef CONFIG_KALLSYMS_ALL
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@@ -94,4 +101,59 @@ struct device_type *wrapper_get_disk_type(void)
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#endif
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+/*
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+ * This wrapper has an 'int' return type instead of the original 'void', to be
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+ * able to report the symbol lookup failure to the caller.
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+ *
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+ * Return 0 on success, -1 on error.
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+ */
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+int wrapper_disk_part_iter_init(struct disk_part_iter *piter, struct gendisk *disk,
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+ unsigned int flags);
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+LTTNG_DISK_PART_TYPE *wrapper_disk_part_iter_next(struct disk_part_iter *piter);
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+void wrapper_disk_part_iter_exit(struct disk_part_iter *piter);
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+
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+/*
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+ * Canary function to check for 'disk_part_iter_init()' at compile time.
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+ *
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+ * From 'include/linux/genhd.h':
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+ *
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+ * extern void disk_part_iter_init(struct disk_part_iter *piter,
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+ * struct gendisk *disk, unsigned int flags);
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+ *
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+ */
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+static inline
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+void __canary__disk_part_iter_init(struct disk_part_iter *piter, struct gendisk *disk,
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+ unsigned int flags)
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+{
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+ disk_part_iter_init(piter, disk, flags);
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+}
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+
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+/*
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+ * Canary function to check for 'disk_part_iter_next()' at compile time.
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+ *
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+ * From 'include/linux/genhd.h':
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+ *
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+ * struct block_device *disk_part_iter_next(struct disk_part_iter *piter);
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+ *
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+ */
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+static inline
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+LTTNG_DISK_PART_TYPE *__canary__disk_part_iter_next(struct disk_part_iter *piter)
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+{
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+ return disk_part_iter_next(piter);
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+}
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+
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+/*
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+ * Canary function to check for 'disk_part_iter_exit()' at compile time.
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+ *
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+ * From 'include/linux/genhd.h':
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+ *
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+ * extern void disk_part_iter_exit(struct disk_part_iter *piter);
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+ *
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+ */
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+static inline
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+void __canary__disk_part_iter_exit(struct disk_part_iter *piter)
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+{
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+ return disk_part_iter_exit(piter);
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+}
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+
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#endif /* _LTTNG_WRAPPER_GENHD_H */
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--
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2.25.1
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@@ -0,0 +1,48 @@
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From 127135b6a45d5fca828815c62308f72de97e5739 Mon Sep 17 00:00:00 2001
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From: Michael Jeanson <mjeanson@efficios.com>
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Date: Thu, 15 Apr 2021 13:56:24 -0400
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Subject: [PATCH 3/4] fix backport: block: add a disk_uevent helper (v5.12)
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Upstream-Status: Backport [2.12.6]
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Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
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Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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Change-Id: I717162069990577abe78e5e7fed28816f32b2c84
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---
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{src/wrapper => wrapper}/genhd.c | 2 +-
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wrapper/genhd.h | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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rename {src/wrapper => wrapper}/genhd.c (98%)
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diff --git a/src/wrapper/genhd.c b/wrapper/genhd.c
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similarity index 98%
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rename from src/wrapper/genhd.c
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rename to wrapper/genhd.c
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index a5a6c410..cbec06f7 100644
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--- a/src/wrapper/genhd.c
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+++ b/wrapper/genhd.c
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@@ -9,7 +9,7 @@
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* Copyright (C) 2021 Michael Jeanson <mjeanson@efficios.com>
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*/
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-#include <lttng/kernel-version.h>
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+#include <lttng-kernel-version.h>
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#include <linux/module.h>
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#include <wrapper/genhd.h>
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diff --git a/wrapper/genhd.h b/wrapper/genhd.h
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index 6bae239d..1b4a4201 100644
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--- a/wrapper/genhd.h
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+++ b/wrapper/genhd.h
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@@ -13,7 +13,7 @@
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#define _LTTNG_WRAPPER_GENHD_H
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#include <linux/genhd.h>
|
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-#include <lttng/kernel-version.h>
|
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+#include <lttng-kernel-version.h>
|
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|
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#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
|
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#define LTTNG_DISK_PART_TYPE struct block_device
|
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--
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2.25.1
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@@ -0,0 +1,71 @@
|
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From 853d5903a200d8a15b3f38780ddaea5c92fa1a03 Mon Sep 17 00:00:00 2001
|
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From: He Zhe <zhe.he@windriver.com>
|
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Date: Mon, 19 Apr 2021 09:09:28 +0000
|
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Subject: [PATCH 4/4] fix: mm, tracing: kfree event name mismatching with
|
||||
provider kmem (v5.12)
|
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|
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a8bc8ae5c932 ("fix: mm, tracing: record slab name for kmem_cache_free() (v5.12)")
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introduces the following call trace for kfree. This is caused by mismatch
|
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between kfree event and its provider kmem.
|
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|
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This patch maps kfree to kmem_kfree.
|
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|
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WARNING: CPU: 2 PID: 42294 at src/lttng-probes.c:81 fixup_lazy_probes+0xb0/0x1b0 [lttng_tracer]
|
||||
CPU: 2 PID: 42294 Comm: modprobe Tainted: G O 5.12.0-rc6-yoctodev-standard #1
|
||||
Hardware name: Intel Corporation JACOBSVILLE/JACOBSVILLE, BIOS JBVLCRB2.86B.0014.P20.2004020248 04/02/2020
|
||||
RIP: 0010:fixup_lazy_probes+0xb0/0x1b0 [lttng_tracer]
|
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Code: 75 28 83 c3 01 3b 5d c4 74 22 48 8b 4d d0 48 63
|
||||
c3 4c 89 e2 4c 89 f6 48 8b 04 c1 4c 8b 38 4c 89
|
||||
ff e8 64 9f 4b de 85 c0 74 c3 <0f> 0b 48 8b 05 bf
|
||||
f2 1e 00 48 8d 50 e8 48 3d f0 a0 98 c0 75 18 eb
|
||||
RSP: 0018:ffffb976807bfbe0 EFLAGS: 00010286
|
||||
RAX: 00000000ffffffff RBX: 0000000000000004 RCX: 0000000000000004
|
||||
RDX: 0000000000000066 RSI: ffffffffc03c10a7 RDI: ffffffffc03c11a1
|
||||
RBP: ffffb976807bfc28 R08: 0000000000000000 R09: 0000000000000001
|
||||
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000004
|
||||
R13: ffffffffc03c2000 R14: ffffffffc03c10a7 R15: ffffffffc03c11a1
|
||||
FS: 00007f0ef9533740(0000) GS:ffffa100faa00000(0000) knlGS:0000000000000000
|
||||
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
|
||||
CR2: 0000561e8f0aa000 CR3: 000000015b318000 CR4: 0000000000350ee0
|
||||
Call Trace:
|
||||
lttng_probe_register+0x38/0xe0 [lttng_tracer]
|
||||
? __event_probe__module_load+0x520/0x520 [lttng_probe_module]
|
||||
__lttng_events_init__module+0x15/0x20 [lttng_probe_module]
|
||||
do_one_initcall+0x68/0x310
|
||||
? kmem_cache_alloc_trace+0x2ad/0x4c0
|
||||
? do_init_module+0x28/0x280
|
||||
do_init_module+0x62/0x280
|
||||
load_module+0x26e4/0x2920
|
||||
? kernel_read_file+0x22e/0x290
|
||||
__do_sys_finit_module+0xb1/0xf0
|
||||
__x64_sys_finit_module+0x1a/0x20
|
||||
do_syscall_64+0x38/0x50
|
||||
entry_SYSCALL_64_after_hwframe+0x44/0xae
|
||||
|
||||
Upstream-Status: Backport [2.12.6]
|
||||
|
||||
Signed-off-by: He Zhe <zhe.he@windriver.com>
|
||||
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
|
||||
Change-Id: I00e8ee2b8c35f6f8602c88295f5113fbbd139709
|
||||
---
|
||||
instrumentation/events/lttng-module/kmem.h | 4 +++-
|
||||
1 file changed, 3 insertions(+), 1 deletion(-)
|
||||
|
||||
diff --git a/instrumentation/events/lttng-module/kmem.h b/instrumentation/events/lttng-module/kmem.h
|
||||
index d787ea54..c9edee61 100644
|
||||
--- a/instrumentation/events/lttng-module/kmem.h
|
||||
+++ b/instrumentation/events/lttng-module/kmem.h
|
||||
@@ -88,7 +88,9 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(kmem_alloc_node, kmem_cache_alloc_node,
|
||||
)
|
||||
|
||||
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,12,0))
|
||||
-LTTNG_TRACEPOINT_EVENT(kfree,
|
||||
+LTTNG_TRACEPOINT_EVENT_MAP(kfree,
|
||||
+
|
||||
+ kmem_kfree,
|
||||
|
||||
TP_PROTO(unsigned long call_site, const void *ptr),
|
||||
|
||||
--
|
||||
2.25.1
|
||||
|
||||
@@ -15,6 +15,9 @@ SRC_URI = "https://lttng.org/files/${BPN}/${BPN}-${PV}.tar.bz2 \
|
||||
file://0002-Fix-filter-interpreter-early-exits-on-uninitialized-.patch \
|
||||
file://0003-fix-mm-tracing-record-slab-name-for-kmem_cache_free-.patch \
|
||||
file://0004-Fix-kretprobe-null-ptr-deref-on-session-destroy.patch \
|
||||
file://0005-fix-block-add-a-disk_uevent-helper-v5.12.patch \
|
||||
file://0006-fix-backport-block-add-a-disk_uevent-helper-v5.12.patch \
|
||||
file://0007-fix-mm-tracing-kfree-event-name-mismatching-with-pro.patch \
|
||||
"
|
||||
|
||||
SRC_URI[sha256sum] = "c4d1a1b42c728e37b6b7947ae16563a011c4b297311aa04d56f9a1791fb5a30a"
|
||||
|
||||
Reference in New Issue
Block a user