mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 21:06:53 +07:00
3e2ffd655c
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>
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_COMPILER_TYPES_H
|
|
#error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
|
|
#endif
|
|
|
|
/* Compiler specific definitions for Clang compiler */
|
|
|
|
#define uninitialized_var(x) x = *(&(x))
|
|
|
|
/* same as gcc, this was present in clang-2.6 so we can assume it works
|
|
* with any version that can compile the kernel
|
|
*/
|
|
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
|
|
|
|
/* all clang versions usable with the kernel support KASAN ABI version 5 */
|
|
#define KASAN_ABI_VERSION 5
|
|
|
|
#if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
|
|
/* emulate gcc's __SANITIZE_ADDRESS__ flag */
|
|
#define __SANITIZE_ADDRESS__
|
|
#define __no_sanitize_address \
|
|
__attribute__((no_sanitize("address", "hwaddress")))
|
|
#else
|
|
#define __no_sanitize_address
|
|
#endif
|
|
|
|
/*
|
|
* Not all versions of clang implement the the type-generic versions
|
|
* of the builtin overflow checkers. Fortunately, clang implements
|
|
* __has_builtin allowing us to avoid awkward version
|
|
* checks. Unfortunately, we don't know which version of gcc clang
|
|
* pretends to be, so the macro may or may not be defined.
|
|
*/
|
|
#if __has_builtin(__builtin_mul_overflow) && \
|
|
__has_builtin(__builtin_add_overflow) && \
|
|
__has_builtin(__builtin_sub_overflow)
|
|
#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
|
|
#endif
|
|
|
|
/* 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 ICC.
|
|
*/
|
|
#define barrier() __asm__ __volatile__("" : : : "memory")
|