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x86/head: Mark *_start_kernel() __noreturn 

Now that start_kernel() is __noreturn, mark its chain of callers
__noreturn.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/c2525f96b88be98ee027ee0291d58003036d4120.1681342859.git.jpoimboe@kernel.org
This commit is contained in:
Josh Poimboeuf 2023-04-12 16:49:33 -07:00 committed by Peter Zijlstra
parent 25a6917ca6
commit 4208d2d798
4 changed files with 8 additions and 6 deletions
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6
arch/x86/include/asm/setup.h
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@ -125,11 +125,11 @@ void clear_bss(void);
#ifdef __i386__ #ifdef __i386__
asmlinkage void __init i386_start_kernel(void); asmlinkage void __init __noreturn i386_start_kernel(void);
#else #else
asmlinkage void __init x86_64_start_kernel(char *real_mode); asmlinkage void __init __noreturn x86_64_start_kernel(char *real_mode);
asmlinkage void __init x86_64_start_reservations(char *real_mode_data); asmlinkage void __init __noreturn x86_64_start_reservations(char *real_mode_data);
#endif /* __i386__ */ #endif /* __i386__ */
#endif /* _SETUP */ #endif /* _SETUP */

2
arch/x86/kernel/head32.c
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@ -29,7 +29,7 @@ static void __init i386_default_early_setup(void)
x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc; x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc;
} }
asmlinkage __visible void __init i386_start_kernel(void) asmlinkage __visible void __init __noreturn i386_start_kernel(void)
{ {
/* Make sure IDT is set up before any exception happens */ /* Make sure IDT is set up before any exception happens */
idt_setup_early_handler(); idt_setup_early_handler();

4
arch/x86/kernel/head64.c
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@ -471,7 +471,7 @@ static void __init copy_bootdata(char *real_mode_data)
sme_unmap_bootdata(real_mode_data); sme_unmap_bootdata(real_mode_data);
} }
asmlinkage __visible void __init x86_64_start_kernel(char * real_mode_data) asmlinkage __visible void __init __noreturn x86_64_start_kernel(char * real_mode_data)
{ {
/* /*
* Build-time sanity checks on the kernel image and module * Build-time sanity checks on the kernel image and module
@ -537,7 +537,7 @@ asmlinkage __visible void __init x86_64_start_kernel(char * real_mode_data)
x86_64_start_reservations(real_mode_data); x86_64_start_reservations(real_mode_data);
} }
void __init x86_64_start_reservations(char *real_mode_data) void __init __noreturn x86_64_start_reservations(char *real_mode_data)
{ {
/* version is always not zero if it is copied */ /* version is always not zero if it is copied */
if (!boot_params.hdr.version) if (!boot_params.hdr.version)

2
tools/objtool/check.c
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@ -225,6 +225,8 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
"start_kernel", "start_kernel",
"stop_this_cpu", "stop_this_cpu",
"usercopy_abort", "usercopy_abort",
"x86_64_start_kernel",
"x86_64_start_reservations",
"xen_cpu_bringup_again", "xen_cpu_bringup_again",
"xen_start_kernel", "xen_start_kernel",
}; };