The patch titled Subject: panic: only warn about deprecated panic_print on write access has been added to the -mm mm-hotfixes-unstable branch. Its filename is panic-only-warn-about-deprecated-panic_print-on-write-access.patch
This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...
This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------ From: Gal Pressman gal@nvidia.com Subject: panic: only warn about deprecated panic_print on write access Date: Tue, 6 Jan 2026 18:33:21 +0200
The panic_print_deprecated() warning is being triggered on both read and write operations to the panic_print parameter.
This causes spurious warnings when users run 'sysctl -a' to list all sysctl values, since that command reads /proc/sys/kernel/panic_print and triggers the deprecation notice.
Modify the handlers to only emit the deprecation warning when the parameter is actually being set:
- sysctl_panic_print_handler(): check 'write' flag before warning. - panic_print_get(): remove the deprecation call entirely.
This way, users are only warned when they actively try to use the deprecated parameter, not when passively querying system state.
Link: https://lkml.kernel.org/r/20260106163321.83586-1-gal@nvidia.com Fixes: ee13240cd78b ("panic: add note that panic_print sysctl interface is deprecated") Fixes: 2683df6539cb ("panic: add note that 'panic_print' parameter is deprecated") Signed-off-by: Gal Pressman gal@nvidia.com Reviewed-by: Mark Bloch mbloch@nvidia.com Reviewed-by: Nimrod Oren noren@nvidia.com Cc: Feng Tang feng.tang@linux.alibaba.com Cc: Joel Granados joel.granados@kernel.org Cc: Petr Mladek pmladek@suse.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
kernel/panic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/panic.c~panic-only-warn-about-deprecated-panic_print-on-write-access +++ a/kernel/panic.c @@ -131,7 +131,8 @@ static int proc_taint(const struct ctl_t static int sysctl_panic_print_handler(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { - panic_print_deprecated(); + if (write) + panic_print_deprecated(); return proc_doulongvec_minmax(table, write, buffer, lenp, ppos); }
@@ -1014,7 +1015,6 @@ static int panic_print_set(const char *v
static int panic_print_get(char *val, const struct kernel_param *kp) { - panic_print_deprecated(); return param_get_ulong(val, kp); }
_
Patches currently in -mm which might be from gal@nvidia.com are
panic-only-warn-about-deprecated-panic_print-on-write-access.patch