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80624263fa
With LOCKDEP enabled, CTI driver triggers the following splat due
to uninitialized lock class for dynamically allocated attribute
objects.
[ 5.372901] coresight etm0: CPU0: ETM v4.0 initialized
[ 5.376694] coresight etm1: CPU1: ETM v4.0 initialized
[ 5.380785] coresight etm2: CPU2: ETM v4.0 initialized
[ 5.385851] coresight etm3: CPU3: ETM v4.0 initialized
[ 5.389808] BUG: key ffff00000564a798 has not been registered!
[ 5.392456] ------------[ cut here ]------------
[ 5.398195] DEBUG_LOCKS_WARN_ON(1)
[ 5.398233] WARNING: CPU: 1 PID: 32 at kernel/locking/lockdep.c:4623 lockdep_init_map_waits+0x14c/0x260
[ 5.406149] Modules linked in:
[ 5.415411] CPU: 1 PID: 32 Comm: kworker/1:1 Not tainted 5.9.0-12034-gbbe85027ce80 #51
[ 5.418553] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
[ 5.426453] Workqueue: events amba_deferred_retry_func
[ 5.433299] pstate: 40000005 (nZcv daif -PAN -UAO -TCO BTYPE=--)
[ 5.438252] pc : lockdep_init_map_waits+0x14c/0x260
[ 5.444410] lr : lockdep_init_map_waits+0x14c/0x260
[ 5.449007] sp : ffff800012bbb720
...
[ 5.531561] Call trace:
[ 5.536847] lockdep_init_map_waits+0x14c/0x260
[ 5.539027] __kernfs_create_file+0xa8/0x1c8
[ 5.543539] sysfs_add_file_mode_ns+0xd0/0x208
[ 5.548054] internal_create_group+0x118/0x3c8
[ 5.552307] internal_create_groups+0x58/0xb8
[ 5.556733] sysfs_create_groups+0x2c/0x38
[ 5.561160] device_add+0x2d8/0x768
[ 5.565148] device_register+0x28/0x38
[ 5.568537] coresight_register+0xf8/0x320
[ 5.572358] cti_probe+0x1b0/0x3f0
...
Fix this by initializing the attributes when they are allocated.
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.