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kgdb patches for 5.15

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Changes for kgdb/kdb this cycle are dominated by a change from
 Sumit that removes as small (256K) private heap from kdb. This is
 change I've hoped for ever since I discovered how few users of this
 heap remained in the kernel, so many thanks to Sumit for hunting
 these down. Other change is an incremental step towards SPDX headers.
 
 Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
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Merge tag 'kgdb-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux

Pull kgdb updates from Daniel Thompson:
 "Changes for kgdb/kdb this cycle are dominated by a change from Sumit
  that removes as small (256K) private heap from kdb. This is change
  I've hoped for ever since I discovered how few users of this heap
  remained in the kernel, so many thanks to Sumit for hunting these
  down.

  The other change is an incremental step towards SPDX headers"

* tag 'kgdb-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux:
  kernel: debug: Convert to SPDX identifier
  kdb: Rename members of struct kdbtab_t
  kdb: Simplify kdb_defcmd macro logic
  kdb: Get rid of redundant kdb_register_flags()
  kdb: Rename struct defcmd_set to struct kdb_macro
  kdb: Get rid of custom debug heap allocator
This commit is contained in:
Linus Torvalds 2021-09-07 12:08:04 -07:00
commit 996fe06160
10 changed files with 387 additions and 728 deletions
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27
include/linux/kdb.h
View file

@ -13,6 +13,8 @@
* Copyright (C) 2009 Jason Wessel <jason.wessel@windriver.com>
*/
#include <linux/list.h>
/* Shifted versions of the command enable bits are be used if the command
* has no arguments (see kdb_check_flags). This allows commands, such as
* go, to have different permissions depending upon whether it is called
@ -64,6 +66,17 @@ typedef enum {
typedef int (*kdb_func_t)(int, const char **);
/* The KDB shell command table */
typedef struct _kdbtab {
char *name; /* Command name */
kdb_func_t func; /* Function to execute command */
char *usage; /* Usage String for this command */
char *help; /* Help message for this command */
short minlen; /* Minimum legal # cmd chars required */
kdb_cmdflags_t flags; /* Command behaviour flags */
struct list_head list_node; /* Command list */
} kdbtab_t;
#ifdef CONFIG_KGDB_KDB
#include <linux/init.h>
#include <linux/sched.h>
@ -193,19 +206,13 @@ static inline const char *kdb_walk_kallsyms(loff_t *pos)
#endif /* ! CONFIG_KALLSYMS */
/* Dynamic kdb shell command registration */
extern int kdb_register(char *, kdb_func_t, char *, char *, short);
extern int kdb_register_flags(char *, kdb_func_t, char *, char *,
short, kdb_cmdflags_t);
extern int kdb_unregister(char *);
extern int kdb_register(kdbtab_t *cmd);
extern void kdb_unregister(kdbtab_t *cmd);
#else /* ! CONFIG_KGDB_KDB */
static inline __printf(1, 2) int kdb_printf(const char *fmt, ...) { return 0; }
static inline void kdb_init(int level) {}
static inline int kdb_register(char *cmd, kdb_func_t func, char *usage,
char *help, short minlen) { return 0; }
static inline int kdb_register_flags(char *cmd, kdb_func_t func, char *usage,
char *help, short minlen,
kdb_cmdflags_t flags) { return 0; }
static inline int kdb_unregister(char *cmd) { return 0; }
static inline int kdb_register(kdbtab_t *cmd) { return 0; }
static inline void kdb_unregister(kdbtab_t *cmd) {}
#endif /* CONFIG_KGDB_KDB */
enum {
KDB_NOT_INITIALIZED,