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authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-21 09:47:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-21 09:47:19 -0700
commit227c3e9eb5cf3552c2cc83225df6d14adb05f8e8 (patch)
tree529caf68f7c4a670813ecddb718e5118ce3cef70 /lib
parent56c631f5aec35117b0b5862a09a447a72dfbd678 (diff)
parent32ee8230b2b06c50f583e14fcd174d7d2edb52f5 (diff)
downloadlinux-227c3e9eb5cf3552c2cc83225df6d14adb05f8e8.tar.gz
Merge tag 'compiler-attributes-for-linus-v5.4' of git://github.com/ojeda/linux
Pull asm inline support from Miguel Ojeda:
 "Make use of gcc 9's "asm inline()" (Rasmus Villemoes):

  gcc 9+ (and gcc 8.3, 7.5) provides a way to override the otherwise
  crude heuristic that gcc uses to estimate the size of the code
  represented by an asm() statement. From the gcc docs

      If you use 'asm inline' instead of just 'asm', then for inlining
      purposes the size of the asm is taken as the minimum size, ignoring
      how many instructions GCC thinks it is.

  For compatibility with older compilers, we obviously want a

      #if [understands asm inline]
      #define asm_inline asm inline
      #else
      #define asm_inline asm
      #endif

  But since we #define the identifier inline to attach some attributes,
  we have to use an alternate spelling of that keyword. gcc provides
  both __inline__ and __inline, and we currently #define both to inline,
  so they all have the same semantics.

  We have to free up one of __inline__ and __inline, and the latter is
  by far the easiest.

  The two x86 changes cause smaller code gen differences than I'd
  expect, but I think we do want the asm_inline thing available sooner
  or later, so this is just to get the ball rolling"

* tag 'compiler-attributes-for-linus-v5.4' of git://github.com/ojeda/linux:
  x86: bug.h: use asm_inline in _BUG_FLAGS definitions
  x86: alternative.h: use asm_inline for all alternative variants
  compiler-types.h: add asm_inline definition
  compiler_types.h: don't #define __inline
  lib/zstd/mem.h: replace __inline by inline
  staging: rtl8723bs: replace __inline by inline
Diffstat (limited to 'lib')
-rw-r--r--lib/zstd/mem.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/zstd/mem.h b/lib/zstd/mem.h
index 3a0f34c8706c..93d7a2c377fe 100644
--- a/lib/zstd/mem.h
+++ b/lib/zstd/mem.h
@@ -27,7 +27,7 @@
 /*-****************************************
 *  Compiler specifics
 ******************************************/
-#define ZSTD_STATIC static __inline __attribute__((unused))
+#define ZSTD_STATIC static inline
 
 /*-**************************************************************
 *  Basic Types