forked from mirrors/linux
b86a50c3b5
Cleanup commit73679e5082("compiler-intel.h: Remove duplicate definition") removed the double definition of __memory_barrier() intrinsics. However, in doing so, it also removed the preceding #undef barrier by accident, meaning, the actual barrier() macro from compiler-gcc.h with inline asm is still in place as __GNUC__ is provided. Subsequently, barrier() can never be defined as __memory_barrier() from compiler.h since it already has a definition in place and if we trust the comment in compiler-intel.h, ecc doesn't support gcc specific asm statements. I don't have an ecc at hand (unsure if that's still used in the field?) and only found this by accident during code review, a revert of that cleanup would be simplest option. Fixes:73679e5082("compiler-intel.h: Remove duplicate definition") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com> Cc: Pranith Kumar <bobby.prani@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: mancha security <mancha1@zoho.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
#ifndef __LINUX_COMPILER_H
|
|
#error "Please don't include <linux/compiler-intel.h> directly, include <linux/compiler.h> instead."
|
|
#endif
|
|
|
|
#ifdef __ECC
|
|
|
|
/* Some compiler specific definitions are overwritten here
|
|
* 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.
|
|
*/
|
|
#undef barrier
|
|
#undef barrier_data
|
|
#undef RELOC_HIDE
|
|
#undef OPTIMIZER_HIDE_VAR
|
|
|
|
#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
|
|
|
|
#ifndef __HAVE_BUILTIN_BSWAP16__
|
|
/* icc has this, but it's called _bswap16 */
|
|
#define __HAVE_BUILTIN_BSWAP16__
|
|
#define __builtin_bswap16 _bswap16
|
|
#endif
|
|
|