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m68k: Initialize jump labels early during setup_arch()

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When using static keys early, e.g. by specifying "thread_backlog_napi"
on the kernel command line:

    WARNING: CPU: 0 PID: 0 at include/linux/jump_label.h:322 setup_backlog_napi_threads+0x40/0xa0
    static_key_enable(): static key '0x5ceec0' used before call to jump_label_init()

The function jump_label_init() should be called from setup_arch() very
early for proper functioning of jump label support.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@yoseli.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/20241016-fix-jump-label-v1-1-eb74c5f68405@yoseli.org
[geert: Add reproducer]
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Jean-Michel Hautbois 2024-10-16 18:18:55 +02:00 committed by Geert Uytterhoeven
parent 47bc874427
commit 6070970db9
1 changed files with 5 additions and 1 deletions
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6
arch/m68k/kernel/setup_mm.c
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@ -249,7 +249,11 @@ void __init setup_arch(char **cmdline_p)
process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
*cmdline_p = m68k_command_line;
memcpy(boot_command_line, *cmdline_p, CL_SIZE);
/*
* Initialise the static keys early as they may be enabled by the
* cpufeature code and early parameters.
*/
jump_label_init();
parse_early_param();
switch (m68k_machtype) {