[xen staging] xen/arm: add missing noreturn attributes

[patchbot@xxxxxxx]

commit f143ff92e4dc25391fe4718aed5cba7035b9ec40
Author:     Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
AuthorDate: Fri Jun 6 14:27:08 2025 -0700
Commit:     Stefano Stabellini <stefano.stabellini@xxxxxxx>
CommitDate: Wed Jun 18 17:40:42 2025 -0700

    xen/arm: add missing noreturn attributes
    
    The marked functions never return to their caller, but lack the
    `noreturn' attribute.
    
    Functions that never return should be declared with a `noreturn'
    attribute.
    
    The lack of `noreturn' causes a violation of MISRA C Rule 17.11 (not
    currently accepted in Xen), and also Rule 2.1: "A project shall not
    contain unreachable code". Depending on the compiler used and the
    compiler optimization used, the lack of `noreturn' might lead to the
    presence of unreachable code.
    
    No functional change.
    
    Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
    Signed-off-by: Victor Lira <victorm.lira@xxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/arm/efi/efi-boot.h            | 2 +-
 xen/arch/arm/include/asm/arm64/traps.h | 2 +-
 xen/arch/arm/include/asm/processor.h   | 2 +-
 xen/arch/arm/setup.c                   | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/efi/efi-boot.h b/xen/arch/arm/efi/efi-boot.h
index d2a09ad3a1..ee80560e13 100644
--- a/xen/arch/arm/efi/efi-boot.h
+++ b/xen/arch/arm/efi/efi-boot.h
@@ -934,7 +934,7 @@ static void __init efi_arch_blexit(void)
         efi_bs->FreePool(memmap);
 }
 
-static void __init efi_arch_halt(void)
+static void noreturn __init efi_arch_halt(void)
 {
     stop_cpu();
 }
diff --git a/xen/arch/arm/include/asm/arm64/traps.h 
b/xen/arch/arm/include/asm/arm64/traps.h
index 3be2fa69ee..b7435c6e73 100644
--- a/xen/arch/arm/include/asm/arm64/traps.h
+++ b/xen/arch/arm/include/asm/arm64/traps.h
@@ -6,7 +6,7 @@ void inject_undef64_exception(struct cpu_user_regs *regs);
 void do_sysreg(struct cpu_user_regs *regs,
                const union hsr hsr);
 
-void do_bad_mode(struct cpu_user_regs *regs, int reason);
+void noreturn do_bad_mode(struct cpu_user_regs *regs, int reason);
 
 #endif /* __ASM_ARM64_TRAPS__ */
 /*
diff --git a/xen/arch/arm/include/asm/processor.h 
b/xen/arch/arm/include/asm/processor.h
index 9cbc4f9110..92c8bc1a31 100644
--- a/xen/arch/arm/include/asm/processor.h
+++ b/xen/arch/arm/include/asm/processor.h
@@ -571,7 +571,7 @@ extern register_t __cpu_logical_map[];
 #endif
 
 #ifndef __ASSEMBLY__
-void panic_PAR(uint64_t par);
+void noreturn panic_PAR(uint64_t par);
 
 /* Debugging functions are declared with external linkage to aid development. 
*/
 void show_registers(const struct cpu_user_regs *regs);
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 734e23da44..ed72317af3 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -63,7 +63,7 @@ bool __read_mostly acpi_disabled;
 
 domid_t __read_mostly max_init_domid;
 
-static __used void init_done(void)
+static __used void noreturn init_done(void)
 {
     int rc;
 
--
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