[PATCH v3] UML: pata_cs5536: fix build for X86_32 UML with TRACEPOINTS

[Randy Dunlap]

Current build of pata_cs5536 for i386 UML fails with:

ERROR: modpost: "__tracepoint_write_msr" [drivers/ata/pata_cs5536.ko] undefined!
ERROR: modpost: "do_trace_write_msr" [drivers/ata/pata_cs5536.ko] undefined!
ERROR: modpost: "__tracepoint_read_msr" [drivers/ata/pata_cs5536.ko] undefined!
ERROR: modpost: "do_trace_read_msr" [drivers/ata/pata_cs5536.ko] undefined!

Add the arch/x86/lib/msr.o binary to resolve these undefined symbols.

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>
Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Cc: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
Cc: linux-ide@xxxxxxxxxxxxxxx
Cc: linux-um@xxxxxxxxxxxxxxxxxxx
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
---
v2: change from not building on UML to fixing the build on UML
v3: add Rev-by: Damien Le Moal

 arch/x86/um/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -- a/arch/x86/um/Makefile b/arch/x86/um/Makefile
--- a/arch/x86/um/Makefile
+++ b/arch/x86/um/Makefile
@@ -21,7 +21,7 @@ obj-y += checksum_32.o syscalls_32.o
 obj-$(CONFIG_ELF_CORE) += elfcore.o
 
 subarch-y = ../lib/string_32.o ../lib/atomic64_32.o ../lib/atomic64_cx8_32.o
-subarch-y += ../lib/cmpxchg8b_emu.o ../lib/atomic64_386_32.o
+subarch-y += ../lib/cmpxchg8b_emu.o ../lib/atomic64_386_32.o ../lib/msr.o
 subarch-y += ../kernel/sys_ia32.o
 
 else