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dyndbg: Remove support for ddebug_query param

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This param has been deprecated for a very long time now, let's rip it
out.

Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Jason Baron <jbaron@akamai.com>
Link: https://lore.kernel.org/r/1634139622-20667-3-git-send-email-jbaron@akamai.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrew Halaney 2021-10-13 11:40:21 -04:00 committed by Greg Kroah-Hartman
parent 5ca1739748
commit 9c40e1aa84
3 changed files with 2 additions and 34 deletions
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6
Documentation/admin-guide/dynamic-debug-howto.rst
View File

@ -249,8 +249,7 @@ Debug messages during Boot Process
To activate debug messages for core code and built-in modules during
the boot process, even before userspace and debugfs exists, use
``dyndbg="QUERY"``, ``module.dyndbg="QUERY"``, or ``ddebug_query="QUERY"``
(``ddebug_query`` is obsoleted by ``dyndbg``, and deprecated). QUERY follows
``dyndbg="QUERY"`` or ``module.dyndbg="QUERY"``. QUERY follows
the syntax described above, but must not exceed 1023 characters. Your
bootloader may impose lower limits.
@ -270,8 +269,7 @@ this boot parameter for debugging purposes.
If ``foo`` module is not built-in, ``foo.dyndbg`` will still be processed at
boot time, without effect, but will be reprocessed when module is
loaded later. ``ddebug_query=`` and bare ``dyndbg=`` are only processed at
boot.
loaded later. Bare ``dyndbg=`` is only processed at boot.
Debug Messages at Module Initialization Time

5
Documentation/admin-guide/kernel-parameters.txt
View File

@ -841,11 +841,6 @@
Format: <port#>,<type>
See also Documentation/input/devices/joystick-parport.rst
ddebug_query= [KNL,DYNAMIC_DEBUG] Enable debug messages at early boot
time. See
Documentation/admin-guide/dynamic-debug-howto.rst for
details. Deprecated, see dyndbg.
debug [KNL] Enable kernel debugging (events log level).
debug_boot_weak_hash

25
lib/dynamic_debug.c
View File

@ -746,21 +746,6 @@ EXPORT_SYMBOL(__dynamic_ibdev_dbg);
#endif
#define DDEBUG_STRING_SIZE 1024
static __initdata char ddebug_setup_string[DDEBUG_STRING_SIZE];
static __init int ddebug_setup_query(char *str)
{
if (strlen(str) >= DDEBUG_STRING_SIZE) {
pr_warn("ddebug boot param string too large\n");
return 0;
}
strlcpy(ddebug_setup_string, str, DDEBUG_STRING_SIZE);
return 1;
}
__setup("ddebug_query=", ddebug_setup_query);
/*
* Install a noop handler to make dyndbg look like a normal kernel cli param.
* This avoids warnings about dyndbg being an unknown cli param when supplied
@ -1133,16 +1118,6 @@ static int __init dynamic_debug_init(void)
entries, modct, (int)((modct * sizeof(struct ddebug_table)) >> 10),
(int)((entries * sizeof(struct _ddebug)) >> 10));
/* apply ddebug_query boot param, dont unload tables on err */
if (ddebug_setup_string[0] != '\0') {
pr_warn("ddebug_query param name is deprecated, change it to dyndbg\n");
ret = ddebug_exec_queries(ddebug_setup_string, NULL);
if (ret < 0)
pr_warn("Invalid ddebug boot param %s\n",
ddebug_setup_string);
else
pr_info("%d changes by ddebug_query\n", ret);
}
/* now that ddebug tables are loaded, process all boot args
* again to find and activate queries given in dyndbg params.
* While this has already been done for known boot params, it