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Finn Thain b7629ce6f4 nubus: Remove proc entries before adding them
The config ROMs on some Nubus cards contain mistakes such as resource
duplication. This results in a warning from proc_register():

    NuBus: Scanning NuBus slots.
    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 1 at fs/proc/generic.c:376 proc_register+0xbc/0xda
    proc_dir_entry '24/5' already registered
    Modules linked in:
    CPU: 0 PID: 1 Comm: swapper Not tainted 6.1.0-5-m68k #1  Debian 6.1.12-1
    Stack from 00829d18:
            00829d18 00451507 00451507 00000000 00000009 0038c57c 00451507 00386bae
            00442945 0045f062 00000178 00868580 00868f50 00386c42 0045f062 00000178
            00166fc8 00000009 00000000 00829d78 008685e4 0037f9ec 00000025 00248808
            0045f0df 00829d94 00166fc8 0045f062 00000178 00000009 0045f0df 008689e4
            008685e4 fafe3a20 00868980 00829df3 00829e32 00000024 00829dc0 00167332
            00868980 00868580 00829e40 00248d36 00829df3 00008124 00868980 00248b0c
    Call Trace: [<0038c57c>] dump_stack+0xc/0x10
     [<00386bae>] __warn+0x70/0xbc
     [<00386c42>] warn_slowpath_fmt+0x48/0x66
     [<00166fc8>] proc_register+0xbc/0xda
     [<0037f9ec>] memcmp+0x0/0x56
     [<00248808>] nubus_get_rsrc_str+0x0/0x5e
     [<00166fc8>] proc_register+0xbc/0xda
     [<00167332>] proc_create_single_data+0x40/0x48
     [<00248d36>] nubus_proc_add_rsrc_mem+0x68/0xa4
     [<00008124>] amiga_mksound+0xb8/0xc8
     [<00248b0c>] nubus_proc_rsrc_show+0x0/0xa4
     [<00386180>] memset+0x0/0x94
     [<0024864a>] nubus_readdir+0x0/0x66
     [<00560f35>] nubus_get_vendorinfo.isra.0+0x87/0x10e
     [<00560fb4>] nubus_get_vendorinfo.isra.0+0x106/0x10e
     [<00248d72>] nubus_proc_add_rsrc+0x0/0x8e
     [<001f6f50>] __dynamic_pr_debug+0x0/0x96
     [<0038741e>] _printk+0x0/0x18
     [<0016fafe>] kernfs_link_sibling+0x9a/0xaa
     [<00561cb0>] nubus_init+0x660/0x79c
     [<0037f7c6>] strcpy+0x0/0x1c
     [<0003f58c>] parse_args+0x0/0x308
     [<00002104>] do_one_initcall+0x0/0x184
     [<00561650>] nubus_init+0x0/0x79c
     [<00010000>] frc1_dst+0xe/0x14
     [<00002172>] do_one_initcall+0x6e/0x184
     [<0037f7c6>] strcpy+0x0/0x1c
     [<0003f58c>] parse_args+0x0/0x308
     [<00002104>] do_one_initcall+0x0/0x184
     [<0054b25c>] kernel_init_freeable+0x192/0x19c
     [<00561650>] nubus_init+0x0/0x79c
     [<0038c6c4>] kernel_init+0x0/0xec
     [<0038c6d8>] kernel_init+0x14/0xec
     [<0038c6c4>] kernel_init+0x0/0xec
     [<0000297c>] ret_from_kernel_thread+0xc/0x14

    ---[ end trace 0000000000000000 ]---

This particular card (a Radius video card) contains a duplicated resource
hence the /proc/bus/nubus/a/1/24/5 entry got registered twice.
(A date resource has ID 5, the vendor info directory has ID 24)

The solution for this is to remove a potentially pre-existing entry before
adding the procfs entry for the resource.

Reported-and-tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/dd1b560bbe426b351cdbb3bbf89414753c3d0117.1679446472.git.fthain@linux-m68k.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2023-05-22 13:51:48 +02:00
Documentation - mailbox api: allow direct registration to a channel 2023-05-07 10:17:33 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
arch m68k: Move signal frame following exception on 68020/030 2023-05-22 13:51:20 +02:00
block for-6.4/block-2023-05-06 2023-05-06 08:28:58 -07:00
certs KEYS: Add missing function documentation 2023-04-24 16:15:52 +03:00
crypto This push fixes the following problems: 2023-05-07 10:57:14 -07:00
drivers nubus: Remove proc entries before adding them 2023-05-22 13:51:48 +02:00
fs 9 smb3 client fixes, mostly DFS or reconnect related 2023-05-07 10:46:21 -07:00
include - mailbox api: allow direct registration to a channel 2023-05-07 10:17:33 -07:00
init Objtool changes for v6.4: 2023-04-28 14:02:54 -07:00
io_uring for-6.4/io_uring-2023-05-07 2023-05-07 10:00:09 -07:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel Minor tracing updates: 2023-05-05 13:11:02 -07:00
lib A single fix for debugobjects: 2023-05-07 11:04:26 -07:00
mm Reinstate the dmapool changes which were accidentally removed by 2023-05-06 11:43:08 -07:00
net Including fixes from netfilter. 2023-05-05 19:12:01 -07:00
rust Rust changes for v6.4 2023-04-30 11:20:22 -07:00
samples LoongArch changes for v6.4 2023-05-04 12:40:16 -07:00
scripts Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
security integrity-v6.4 2023-04-29 10:11:32 -07:00
sound sound fixes for 6.4-rc1 2023-05-06 08:07:11 -07:00
tools Disable building BPF based features by default for v6.4. 2023-05-07 11:32:18 -07:00
usr initramfs: Check negative timestamp to prevent broken cpio archive 2023-04-16 17:37:01 +09:00
virt s390: 2023-05-01 12:06:20 -07:00
.clang-format cxl for v6.4 2023-04-30 11:51:51 -07:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for *.dtso files 2023-02-26 15:28:23 +09:00
.gitignore linux-kselftest-kunit-6.4-rc1 2023-04-24 12:31:32 -07:00
.mailmap for-6.4/block-2023-05-06 2023-05-06 08:28:58 -07:00
.rustfmt.toml rust: add `.rustfmt.toml` 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS A handful of late-arriving documentation fixes, plus one Spanish 2023-05-05 13:16:42 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Including fixes from netfilter. 2023-05-05 19:12:01 -07:00
Makefile Linux 6.4-rc1 2023-05-07 13:34:35 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.