Add and move fall-through comments in system-specific code.

This patch fixes -Wimplicit-fallthrough warnings in system-specific
code that show up building glibc with -Wextra, by adding fall-through
comments, or moving existing such comments to the place required for
them to work (immediately before the case label being fallen through).

Tested with build-many-glibcs.py.

	* sysdeps/i386/dl-machine.h (elf_machine_rela): Add fall-through
	comments.
	* sysdeps/m68k/m680x0/fpu/s_cexp_template.c (s(__cexp)): Likewise.
	* sysdeps/m68k/memcopy.h (WORD_COPY_FWD): Likewise.
	(WORD_COPY_BWD): Likewise.
	* sysdeps/mach/hurd/ioctl.c (__ioctl): Likewise.
	* sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_rela):
	Likewise.
	* sysdeps/s390/iso-8859-1_cp037_z900.c (TR_LOOP): Likewise.
	* sysdeps/mips/dl-machine.h (elf_machine_reloc): Move fall-through
	comment.
	* sysdeps/mips/dl-trampoline.c (__dl_runtime_resolve): Likewise.

1 files changed, 2 insertions, 0 deletions

diff --git a/sysdeps/mach/hurd/ioctl.c b/sysdeps/mach/hurd/ioctl.c
index cd630e179e..abd13f6bf7 100644
--- a/sysdeps/mach/hurd/ioctl.c
+++ b/sysdeps/mach/hurd/ioctl.c
@@ -177,6 +177,7 @@ __ioctl (int fd, unsigned long int request, ...)
 	case MACH_SEND_INVALID_REPLY:
 	case MACH_RCV_INVALID_NAME:
 	  __mig_dealloc_reply_port (m->msgh_local_port);
+	  /* Fall through.  */
 	default:
 	  return err;
 	}
@@ -318,6 +319,7 @@ __ioctl (int fd, unsigned long int request, ...)
     case EOPNOTSUPP:
       /* The server didn't understand the RPC.  */
       err = ENOTTY;
+      /* Fall through.  */
     default:
       return __hurd_fail (err);
     }