[tip:ras/core] RAS: Build debugfs.o only when enabled in Kconfig

[tip-bot for Valdis Kletnieks]

Commit-ID:  b6ff24f7b5101101ff897dfdde3f37924e676bc2
Gitweb:     https://git.kernel.org/tip/b6ff24f7b5101101ff897dfdde3f37924e676bc2
Author:     Valdis Kletnieks <valdis.kletnieks@xxxxxx>
AuthorDate: Thu, 8 Aug 2019 16:32:27 +0200
Committer:  Borislav Petkov <bp@xxxxxxx>
CommitDate: Thu, 8 Aug 2019 17:44:02 +0200

RAS: Build debugfs.o only when enabled in Kconfig

In addition, the 0day bot reported this build error:

  >> drivers/ras/debugfs.c:10:5: error: redefinition of 'ras_userspace_consumers'
      int ras_userspace_consumers(void)
          ^~~~~~~~~~~~~~~~~~~~~~~
     In file included from drivers/ras/debugfs.c:3:0:
     include/linux/ras.h:14:19: note: previous definition of 'ras_userspace_consumers' was here
      static inline int ras_userspace_consumers(void) { return 0; }
                      ^~~~~~~~~~~~~~~~~~~~~~~

for a riscv-specific .config where CONFIG_DEBUG_FS is not set. Fix all
that by making debugfs.o depend on that define.

 [ bp: Rewrite commit message. ]

Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@xxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: linux-edac@xxxxxxxxxxxxxxx
Cc: x86@xxxxxxxxxx
Link: http://lkml.kernel.org/r/7053.1565218556@turing-police
---
 drivers/ras/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/ras/Makefile b/drivers/ras/Makefile
index ef6777e14d3d..6f0404f50107 100644
--- a/drivers/ras/Makefile
+++ b/drivers/ras/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_RAS)	+= ras.o debugfs.o
+obj-$(CONFIG_RAS)	+= ras.o
+obj-$(CONFIG_DEBUG_FS)	+= debugfs.o
 obj-$(CONFIG_RAS_CEC)	+= cec.o