[PATCH v4 4/5] xen: Misc cleanup as a result of the previous patches

[Andrew Cooper <andrew.cooper3@citrix.com>]

This includes:
 * A stale comment in sh_skip_sync()
 * A dead for ever loop in __bug()
 * A prototype for machine_power_off() which unimplemented in any architecture
 * Replacing a for(;;); loop with unreachable()

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
CC: Keir Fraser <keir@xen.org>
CC: Jan Beulich <JBeulich@suse.com>
---
 xen/arch/x86/efi/boot.c         |    2 +-
 xen/arch/x86/mm/shadow/common.c |    1 -
 xen/drivers/char/console.c      |    1 -
 xen/include/xen/shutdown.h      |    1 -
 4 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/xen/arch/x86/efi/boot.c b/xen/arch/x86/efi/boot.c
index a26e0af..62c4812 100644
--- a/xen/arch/x86/efi/boot.c
+++ b/xen/arch/x86/efi/boot.c
@@ -201,7 +201,7 @@ static void __init noreturn blexit(const CHAR16 *str)
         efi_bs->FreePages(xsm.addr, PFN_UP(xsm.size));
 
     efi_bs->Exit(efi_ih, EFI_SUCCESS, 0, NULL);
-    for( ; ; ); /* not reached */
+    unreachable(); /* not reached */
 }
 
 /* generic routine for printing error messages */
diff --git a/xen/arch/x86/mm/shadow/common.c b/xen/arch/x86/mm/shadow/common.c
index 11c6b62..b400ccb 100644
--- a/xen/arch/x86/mm/shadow/common.c
+++ b/xen/arch/x86/mm/shadow/common.c
@@ -875,7 +875,6 @@ static int sh_skip_sync(struct vcpu *v, mfn_t gl1mfn)
     SHADOW_ERROR("gmfn %#lx was OOS but not shadowed as an l1.\n",
                  mfn_x(gl1mfn));
     BUG();
-    return 0; /* BUG() is no longer __attribute__((noreturn)). */
 }
 
 
diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c
index 532c426..7d4383c 100644
--- a/xen/drivers/char/console.c
+++ b/xen/drivers/char/console.c
@@ -1089,7 +1089,6 @@ void __bug(char *file, int line)
     printk("Xen BUG at %s:%d\n", file, line);
     dump_execution_state();
     panic("Xen BUG at %s:%d", file, line);
-    for ( ; ; ) ;
 }
 
 void __warn(char *file, int line)
diff --git a/xen/include/xen/shutdown.h b/xen/include/xen/shutdown.h
index f04905b..a00bfef 100644
--- a/xen/include/xen/shutdown.h
+++ b/xen/include/xen/shutdown.h
@@ -10,6 +10,5 @@ void noreturn dom0_shutdown(u8 reason);
 
 void noreturn machine_restart(unsigned int delay_millisecs);
 void noreturn machine_halt(void);
-void machine_power_off(void);
 
 #endif /* __XEN_SHUTDOWN_H__ */
-- 
1.7.10.4