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| author |   Dmitry Safonov <dima@arista.com> | 2020-06-08 21:31:24 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 09:39:12 -0700 |
| commit | ebf0a36a32b25fe6ba8a1b6bd3135432ebd9aa5c (patch) | |
| tree | 41789a8beb8caec8299dad419a8a7db045c77f30 /arch/sh/include/asm/kdebug.h | |
| parent | s390: add show_stack_loglvl() (diff) | |
| download | linux-dev-ebf0a36a32b25fe6ba8a1b6bd3135432ebd9aa5c.tar.xz linux-dev-ebf0a36a32b25fe6ba8a1b6bd3135432ebd9aa5c.zip | |
sh: add loglvl to dump_mem()
Currently, the log-level of show_stack() depends on a platform
realization. It creates situations where the headers are printed with
lower log level or higher than the stacktrace (depending on a platform or
user).
Furthermore, it forces the logic decision from user to an architecture
side. In result, some users as sysrq/kdb/etc are doing tricks with
temporary rising console_loglevel while printing their messages. And in
result it not only may print unwanted messages from other CPUs, but also
omit printing at all in the unlucky case where the printk() was deferred.
Introducing log-level parameter and KERN_UNSUPPRESSED [1] seems an easier
approach than introducing more printk buffers. Also, it will consolidate
printings with headers.
Add log level argument to dump_mem() as a preparation to introduce
show_stack_loglvl().
[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-dima@arista.com/T/#u
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200418201944.482088-30-dima@arista.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sh/include/asm/kdebug.h')
| -rw-r--r-- | arch/sh/include/asm/kdebug.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/sh/include/asm/kdebug.h b/arch/sh/include/asm/kdebug.h index 5212f5fcd752..de8693fabb1d 100644 --- a/arch/sh/include/asm/kdebug.h +++ b/arch/sh/include/asm/kdebug.h @@ -13,6 +13,7 @@ enum die_val { /* arch/sh/kernel/dumpstack.c */ extern void printk_address(unsigned long address, int reliable); -extern void dump_mem(const char *str, unsigned long bottom, unsigned long top); +extern void dump_mem(const char *str, const char *loglvl, + unsigned long bottom, unsigned long top); #endif /* __ASM_SH_KDEBUG_H */ |