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init: bootconfig: Remove all bootconfig data when the init memory is removed

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Since the bootconfig is used only in the init functions,
it doesn't need to keep the data after boot. Free it when
the init memory is removed.

Link: https://lkml.kernel.org/r/163077084958.222577.5924961258513004428.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2021-09-05 00:54:09 +09:00 committed by Steven Rostedt (VMware)
parent 4b6b08f2e4
commit 40caa127f3
1 changed files with 12 additions and 2 deletions
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14
init/main.c
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@ -468,7 +468,12 @@ static void __init setup_boot_config(void)
return;
}
#else
static void __init exit_boot_config(void)
{
xbc_destroy_all();
}
#else /* !CONFIG_BOOT_CONFIG */
static void __init setup_boot_config(void)
{
@ -481,7 +486,11 @@ static int __init warn_bootconfig(char *str)
pr_warn("WARNING: 'bootconfig' found on the kernel command line but CONFIG_BOOT_CONFIG is not set.\n");
return 0;
}
#endif
#define exit_boot_config() do {} while (0)
#endif /* CONFIG_BOOT_CONFIG */
early_param("bootconfig", warn_bootconfig);
/* Change NUL term back to "=", to make "param" the whole string. */
@ -1493,6 +1502,7 @@ static int __ref kernel_init(void *unused)
kprobe_free_init_mem();
ftrace_free_init_mem();
kgdb_free_init_mem();
exit_boot_config();
free_initmem();
mark_readonly();