4047a7ad3b
[ Upstream commit 3e2ffd655cc6a694608d997738989ff5572a8266 ] Since commit815f0ddb34("include/linux/compiler*.h: make compiler-*.h mutually exclusive") clang no longer reuses the OPTIMIZER_HIDE_VAR macro from compiler-gcc - instead it gets the version in include/linux/compiler.h. Unfortunately that version doesn't actually prevent compiler from optimizing out the variable. Fix up by moving the macro out from compiler-gcc.h to compiler.h. Compilers without incline asm support will keep working since it's protected by an ifdef. Also fix up comments to match reality since we are no longer overriding any macros. Build-tested with gcc and clang. Fixes:815f0ddb34("include/linux/compiler*.h: make compiler-*.h mutually exclusive") Cc: Eli Friedman <efriedma@codeaurora.org> Cc: Joe Perches <joe@perches.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_COMPILER_TYPES_H
|
|
#error "Please don't include <linux/compiler-intel.h> directly, include <linux/compiler.h> instead."
|
|
#endif
|
|
|
|
#ifdef __ECC
|
|
|
|
/* Compiler specific definitions for Intel ECC compiler */
|
|
|
|
#include <asm/intrinsics.h>
|
|
|
|
/* Intel ECC compiler doesn't support gcc specific asm stmts.
|
|
* It uses intrinsics to do the equivalent things.
|
|
*/
|
|
|
|
#define barrier() __memory_barrier()
|
|
#define barrier_data(ptr) barrier()
|
|
|
|
#define RELOC_HIDE(ptr, off) \
|
|
({ unsigned long __ptr; \
|
|
__ptr = (unsigned long) (ptr); \
|
|
(typeof(ptr)) (__ptr + (off)); })
|
|
|
|
/* This should act as an optimization barrier on var.
|
|
* Given that this compiler does not have inline assembly, a compiler barrier
|
|
* is the best we can do.
|
|
*/
|
|
#define OPTIMIZER_HIDE_VAR(var) barrier()
|
|
|
|
/* Intel ECC compiler doesn't support __builtin_types_compatible_p() */
|
|
#define __must_be_array(a) 0
|
|
|
|
#endif
|
|
|
|
/* icc has this, but it's called _bswap16 */
|
|
#define __HAVE_BUILTIN_BSWAP16__
|
|
#define __builtin_bswap16 _bswap16
|
|
|
|
/* The following are for compatibility with GCC, from compiler-gcc.h,
|
|
* and may be redefined here because they should not be shared with other
|
|
* compilers, like clang.
|
|
*/
|
|
#define __visible __attribute__((externally_visible))
|