[PATCH v2 1/2] sparc,x86: vdso: remove meaningless undefining CONFIG_OPTIMIZE_INLINING

[Masahiro Yamada]

The code, #undef CONFIG_OPTIMIZE_INLINING, is not working as expected
because <linux/compiler_types.h> is parsed before vclock_gettime.c
since 28128c61e08e ("kconfig.h: Include compiler types to avoid missed
struct attributes").

Since then, <linux/compiler_types.h> is included really early by
using the '-include' option. So, you cannot negate the decision of
<linux/compiler_types.h> in this way.

You can confirm it by checking the pre-processed code, like this:

  $ make arch/x86/entry/vdso/vdso32/vclock_gettime.i

There is no difference with/without CONFIG_CC_OPTIMIZE_FOR_SIZE.

It is about two years since 28128c61e08e. Nobody has reported a
problem (or, nobody has even noticed the fact that this code is not
working).

It is ugly and unreliable to attempt to undefine a CONFIG option from
C files, and anyway the inlining heuristic is up to the compiler.

Just remove the broken code.

Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@xxxxxxxxx>
---

Changes in v2:
  - fix a type
  - add Acked-by

 arch/sparc/vdso/vdso32/vclock_gettime.c     | 4 ----
 arch/x86/entry/vdso/vdso32/vclock_gettime.c | 4 ----
 2 files changed, 8 deletions(-)

diff --git a/arch/sparc/vdso/vdso32/vclock_gettime.c b/arch/sparc/vdso/vdso32/vclock_gettime.c
index 026abb3b826c..d7f99e6745ea 100644
--- a/arch/sparc/vdso/vdso32/vclock_gettime.c
+++ b/arch/sparc/vdso/vdso32/vclock_gettime.c
@@ -4,10 +4,6 @@
 
 #define	BUILD_VDSO32
 
-#ifndef	CONFIG_CC_OPTIMIZE_FOR_SIZE
-#undef	CONFIG_OPTIMIZE_INLINING
-#endif
-
 #ifdef	CONFIG_SPARC64
 
 /*
diff --git a/arch/x86/entry/vdso/vdso32/vclock_gettime.c b/arch/x86/entry/vdso/vdso32/vclock_gettime.c
index 9242b28418d5..3c26488db94d 100644
--- a/arch/x86/entry/vdso/vdso32/vclock_gettime.c
+++ b/arch/x86/entry/vdso/vdso32/vclock_gettime.c
@@ -1,10 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #define BUILD_VDSO32
 
-#ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
-#undef CONFIG_OPTIMIZE_INLINING
-#endif
-
 #ifdef CONFIG_X86_64
 
 /*
-- 
2.17.1