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| author | Jocelyn Falempe <jfalempe@redhat.com> | 2024-07-02 14:26:04 +0200 |
|---|---|---|
| committer | Jocelyn Falempe <jfalempe@redhat.com> | 2024-07-17 12:35:24 +0200 |
| commit | e1a261ba599eec97e1c5c7760d5c3698fc24e6a6 (patch) | |
| tree | be30b64995563328ef29cb1b54e30256ddbf7e71 /drivers/hv | |
| parent | a237f217bad50c381773da5b00442710d1449098 (diff) | |
| download | lwn-e1a261ba599eec97e1c5c7760d5c3698fc24e6a6.tar.gz lwn-e1a261ba599eec97e1c5c7760d5c3698fc24e6a6.zip | |
printk: Add a short description string to kmsg_dump()
kmsg_dump doesn't forward the panic reason string to the kmsg_dumper
callback.
This patch adds a new struct kmsg_dump_detail, that will hold the
reason and description, and pass it to the dump() callback.
To avoid updating all kmsg_dump() call, it adds a kmsg_dump_desc()
function and a macro for backward compatibility.
I've written this for drm_panic, but it can be useful for other
kmsg_dumper.
It allows to see the panic reason, like "sysrq triggered crash"
or "VFS: Unable to mount root fs on xxxx" on the drm panic screen.
v2:
* Use a struct kmsg_dump_detail to hold the reason and description
pointer, for more flexibility if we want to add other parameters.
(Kees Cook)
* Fix powerpc/nvram_64 build, as I didn't update the forward
declaration of oops_to_nvram()
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Acked-by: Petr Mladek <pmladek@suse.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Acked-by: Kees Cook <kees@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240702122639.248110-1-jfalempe@redhat.com
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/hv_common.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c index 9c452bfbd571..7a35c82976e0 100644 --- a/drivers/hv/hv_common.c +++ b/drivers/hv/hv_common.c @@ -207,13 +207,13 @@ static int hv_die_panic_notify_crash(struct notifier_block *self, * buffer and call into Hyper-V to transfer the data. */ static void hv_kmsg_dump(struct kmsg_dumper *dumper, - enum kmsg_dump_reason reason) + struct kmsg_dump_detail *detail) { struct kmsg_dump_iter iter; size_t bytes_written; /* We are only interested in panics. */ - if (reason != KMSG_DUMP_PANIC || !sysctl_record_panic_msg) + if (detail->reason != KMSG_DUMP_PANIC || !sysctl_record_panic_msg) return; /* |