diff options
| author | Jason Baron <jbaron@akamai.com> | 2023-03-03 11:50:56 -0500 |
|---|---|---|
| committer | Luis Chamberlain <mcgrof@kernel.org> | 2023-03-09 12:58:36 -0800 |
| commit | 7deabd67498869640c937c9bd83472574b7dea0b (patch) | |
| tree | ee391fa84ba9585e708978f567201b9794bd16fb /kernel/module/internal.h | |
| parent | 85c37208b0cb178084600dd01d9f97a32b6a21ea (diff) | |
dyndbg: use the module notifier callbacks
Bring dynamic debug in line with other subsystems by using the module
notifier callbacks. This results in a net decrease in core module
code.
Additionally, Jim Cromie has a new dynamic debug classmap feature,
which requires that jump labels be initialized prior to dynamic debug.
Specifically, the new feature toggles a jump label from the existing
dynamic_debug_setup() function. However, this does not currently work
properly, because jump labels are initialized via the
'module_notify_list' notifier chain, which is invoked after the
current call to dynamic_debug_setup(). Thus, this patch ensures that
jump labels are initialized prior to dynamic debug by setting the
dynamic debug notifier priority to 0, while jump labels have the
higher priority of 1.
Tested by Jim using his new test case, and I've verfied the correct
printing via: # modprobe test_dynamic_debug dyndbg.
Link: https://lore.kernel.org/lkml/20230113193016.749791-21-jim.cromie@gmail.com/
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202302190427.9iIK2NfJ-lkp@intel.com/
Tested-by: Jim Cromie <jim.cromie@gmail.com>
Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
CC: Jim Cromie <jim.cromie@gmail.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jason Baron <jbaron@akamai.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'kernel/module/internal.h')
| -rw-r--r-- | kernel/module/internal.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/module/internal.h b/kernel/module/internal.h index c6c44ceca07a..e3883b7d4840 100644 --- a/kernel/module/internal.h +++ b/kernel/module/internal.h @@ -45,7 +45,6 @@ extern const struct kernel_symbol __stop___ksymtab_gpl[]; extern const s32 __start___kcrctab[]; extern const s32 __start___kcrctab_gpl[]; -#include <linux/dynamic_debug.h> struct load_info { const char *name; /* pointer to module in temporary copy, freed at end of load_module() */ @@ -55,7 +54,6 @@ struct load_info { Elf_Shdr *sechdrs; char *secstrings, *strtab; unsigned long symoffs, stroffs, init_typeoffs, core_typeoffs; - struct _ddebug_info dyndbg; bool sig_ok; #ifdef CONFIG_KALLSYMS unsigned long mod_kallsyms_init_off; |