x86/asm/crypto: Move jump_table to .rodata section

stacktool reports the following warning:

  stacktool: arch/x86/crypto/crc32c-pcl-intel-asm_64.o: crc_pcl()+0x11dd: can't decode instruction

It gets confused when trying to decode jump_table data.  Move jump_table
to the .rodata section which is a more appropriate home for read-only
data.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Bernd Petrovitsch <bernd@petrovitsch.priv.at>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Chris J Arges <chris.j.arges@canonical.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Pedro Alves <palves@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: live-patching@vger.kernel.org
Link: http://lkml.kernel.org/r/1dbf80c097bb9d89c0cbddc01a815ada690e3b32.1453405861.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/crypto/crc32c-pcl-intel-asm_64.S

@@ -170,8 +170,8 @@ continue_block:
 	## branch into array
 	lea	jump_table(%rip), bufp
 	movzxw  (bufp, %rax, 2), len
-	offset=crc_array-jump_table
-	lea     offset(bufp, len, 1), bufp
+	lea	crc_array(%rip), bufp
+	lea     (bufp, len, 1), bufp
 	jmp     *bufp
 
 	################################################################
@@ -310,7 +310,9 @@ do_return:
 	popq    %rdi
 	popq    %rbx
         ret
+ENDPROC(crc_pcl)
 
+.section	.rodata, "a", %progbits
         ################################################################
         ## jump table        Table is 129 entries x 2 bytes each
         ################################################################
@@ -324,13 +326,11 @@ JMPTBL_ENTRY %i
 	i=i+1
 .endr
 
-ENDPROC(crc_pcl)
 
 	################################################################
 	## PCLMULQDQ tables
 	## Table is 128 entries x 2 words (8 bytes) each
 	################################################################
-.section	.rodata, "a", %progbits
 .align 8
 K_table:
 	.long 0x493c7d27, 0x00000001