forked from mirrors/linux
include/linux/compiler*.h: make compiler-*.h mutually exclusive
Commitcafa0010cd("Raise the minimum required gcc version to 4.6") recently exposed a brittle part of the build for supporting non-gcc compilers. Both Clang and ICC define __GNUC__, __GNUC_MINOR__, and __GNUC_PATCHLEVEL__ for quick compatibility with code bases that haven't added compiler specific checks for __clang__ or __INTEL_COMPILER. This is brittle, as they happened to get compatibility by posing as a certain version of GCC. This broke when upgrading the minimal version of GCC required to build the kernel, to a version above what ICC and Clang claim to be. Rather than always including compiler-gcc.h then undefining or redefining macros in compiler-intel.h or compiler-clang.h, let's separate out the compiler specific macro definitions into mutually exclusive headers, do more proper compiler detection, and keep shared definitions in compiler_types.h. Fixes:cafa0010cd("Raise the minimum required gcc version to 4.6") Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com> Suggested-by: Eli Friedman <efriedma@codeaurora.org> Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Desaulniers
Linus Torvalds
parent
899fbc33fd
commit
815f0ddb34
9 changed files with 134 additions and 254 deletions
|
|
@ -38,25 +38,14 @@
|
|||
#error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32
|
||||
#endif
|
||||
/*
|
||||
* GCC 3.0, 3.1: general bad code generation.
|
||||
* GCC 3.2.0: incorrect function argument offset calculation.
|
||||
* GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c
|
||||
* (http://gcc.gnu.org/PR8896) and incorrect structure
|
||||
* initialisation in fs/jffs2/erase.c
|
||||
* GCC 4.8.0-4.8.2: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
|
||||
* miscompiles find_get_entry(), and can result in EXT3 and EXT4
|
||||
* filesystem corruption (possibly other FS too).
|
||||
*/
|
||||
#ifdef __GNUC__
|
||||
#if (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
|
||||
#error Your compiler is too buggy; it is known to miscompile kernels.
|
||||
#error Known good compilers: 3.3, 4.x
|
||||
#endif
|
||||
#if GCC_VERSION >= 40800 && GCC_VERSION < 40803
|
||||
#if defined(GCC_VERSION) && GCC_VERSION >= 40800 && GCC_VERSION < 40803
|
||||
#error Your compiler is too buggy; it is known to miscompile kernels
|
||||
#error and result in filesystem corruption and oopses.
|
||||
#endif
|
||||
#endif
|
||||
|
||||
int main(void)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -43,7 +43,7 @@
|
|||
#define MISSING_CASE(x) WARN(1, "Missing case (%s == %ld)\n", \
|
||||
__stringify(x), (long)(x))
|
||||
|
||||
#if GCC_VERSION >= 70000
|
||||
#if defined(GCC_VERSION) && GCC_VERSION >= 70000
|
||||
#define add_overflows(A, B) \
|
||||
__builtin_add_overflow_p((A), (B), (typeof((A) + (B)))0)
|
||||
#else
|
||||
|
|
|
|||
|
|
@ -146,12 +146,7 @@ static int kempld_wdt_set_stage_timeout(struct kempld_wdt_data *wdt_data,
|
|||
u32 remainder;
|
||||
u8 stage_cfg;
|
||||
|
||||
#if GCC_VERSION < 40400
|
||||
/* work around a bug compiling do_div() */
|
||||
prescaler = READ_ONCE(kempld_prescaler[PRESCALER_21]);
|
||||
#else
|
||||
prescaler = kempld_prescaler[PRESCALER_21];
|
||||
#endif
|
||||
|
||||
if (!stage)
|
||||
return -EINVAL;
|
||||
|
|
|
|||
|
|
@ -6,11 +6,7 @@
|
|||
/* Some compiler specific definitions are overwritten here
|
||||
* for Clang compiler
|
||||
*/
|
||||
|
||||
#ifdef uninitialized_var
|
||||
#undef uninitialized_var
|
||||
#define uninitialized_var(x) x = *(&(x))
|
||||
#endif
|
||||
|
||||
/* same as gcc, this was present in clang-2.6 so we can assume it works
|
||||
* with any version that can compile the kernel
|
||||
|
|
@ -25,14 +21,8 @@
|
|||
#define __SANITIZE_ADDRESS__
|
||||
#endif
|
||||
|
||||
#undef __no_sanitize_address
|
||||
#define __no_sanitize_address __attribute__((no_sanitize("address")))
|
||||
|
||||
/* Clang doesn't have a way to turn it off per-function, yet. */
|
||||
#ifdef __noretpoline
|
||||
#undef __noretpoline
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Not all versions of clang implement the the type-generic versions
|
||||
* of the builtin overflow checkers. Fortunately, clang implements
|
||||
|
|
@ -40,9 +30,17 @@
|
|||
* checks. Unfortunately, we don't know which version of gcc clang
|
||||
* pretends to be, so the macro may or may not be defined.
|
||||
*/
|
||||
#undef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW
|
||||
#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")
|
||||
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
|
||||
#define __assume_aligned(a, ...) \
|
||||
__attribute__((__assume_aligned__(a, ## __VA_ARGS__)))
|
||||
|
|
|
|||
|
|
@ -75,48 +75,6 @@
|
|||
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Feature detection for gnu_inline (gnu89 extern inline semantics). Either
|
||||
* __GNUC_STDC_INLINE__ is defined (not using gnu89 extern inline semantics,
|
||||
* and we opt in to the gnu89 semantics), or __GNUC_STDC_INLINE__ is not
|
||||
* defined so the gnu89 semantics are the default.
|
||||
*/
|
||||
#ifdef __GNUC_STDC_INLINE__
|
||||
# define __gnu_inline __attribute__((gnu_inline))
|
||||
#else
|
||||
# define __gnu_inline
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Force always-inline if the user requests it so via the .config,
|
||||
* or if gcc is too old.
|
||||
* GCC does not warn about unused static inline functions for
|
||||
* -Wunused-function. This turns out to avoid the need for complex #ifdef
|
||||
* directives. Suppress the warning in clang as well by using "unused"
|
||||
* function attribute, which is redundant but not harmful for gcc.
|
||||
* Prefer gnu_inline, so that extern inline functions do not emit an
|
||||
* externally visible function. This makes extern inline behave as per gnu89
|
||||
* semantics rather than c99. This prevents multiple symbol definition errors
|
||||
* of extern inline functions at link time.
|
||||
* A lot of inline functions can cause havoc with function tracing.
|
||||
*/
|
||||
#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \
|
||||
!defined(CONFIG_OPTIMIZE_INLINING)
|
||||
#define inline \
|
||||
inline __attribute__((always_inline, unused)) notrace __gnu_inline
|
||||
#else
|
||||
#define inline inline __attribute__((unused)) notrace __gnu_inline
|
||||
#endif
|
||||
|
||||
#define __inline__ inline
|
||||
#define __inline inline
|
||||
#define __always_inline inline __attribute__((always_inline))
|
||||
#define noinline __attribute__((noinline))
|
||||
|
||||
#define __packed __attribute__((packed))
|
||||
#define __weak __attribute__((weak))
|
||||
#define __alias(symbol) __attribute__((alias(#symbol)))
|
||||
|
||||
#ifdef RETPOLINE
|
||||
#define __noretpoline __attribute__((indirect_branch("keep")))
|
||||
#endif
|
||||
|
|
@ -135,55 +93,9 @@
|
|||
*/
|
||||
#define __naked __attribute__((naked)) noinline __noclone notrace
|
||||
|
||||
#define __noreturn __attribute__((noreturn))
|
||||
|
||||
/*
|
||||
* From the GCC manual:
|
||||
*
|
||||
* Many functions have no effects except the return value and their
|
||||
* return value depends only on the parameters and/or global
|
||||
* variables. Such a function can be subject to common subexpression
|
||||
* elimination and loop optimization just as an arithmetic operator
|
||||
* would be.
|
||||
* [...]
|
||||
*/
|
||||
#define __pure __attribute__((pure))
|
||||
#define __aligned(x) __attribute__((aligned(x)))
|
||||
#define __aligned_largest __attribute__((aligned))
|
||||
#define __printf(a, b) __attribute__((format(printf, a, b)))
|
||||
#define __scanf(a, b) __attribute__((format(scanf, a, b)))
|
||||
#define __attribute_const__ __attribute__((__const__))
|
||||
#define __maybe_unused __attribute__((unused))
|
||||
#define __always_unused __attribute__((unused))
|
||||
#define __mode(x) __attribute__((mode(x)))
|
||||
|
||||
#define __must_check __attribute__((warn_unused_result))
|
||||
#define __malloc __attribute__((__malloc__))
|
||||
|
||||
#define __used __attribute__((__used__))
|
||||
#define __compiler_offsetof(a, b) \
|
||||
__builtin_offsetof(a, b)
|
||||
|
||||
/* Mark functions as cold. gcc will assume any path leading to a call
|
||||
* to them will be unlikely. This means a lot of manual unlikely()s
|
||||
* are unnecessary now for any paths leading to the usual suspects
|
||||
* like BUG(), printk(), panic() etc. [but let's keep them for now for
|
||||
* older compilers]
|
||||
*
|
||||
* Early snapshots of gcc 4.3 don't support this and we can't detect this
|
||||
* in the preprocessor, but we can live with this because they're unreleased.
|
||||
* Maketime probing would be overkill here.
|
||||
*
|
||||
* gcc also has a __attribute__((__hot__)) to move hot functions into
|
||||
* a special section, but I don't see any sense in this right now in
|
||||
* the kernel context
|
||||
*/
|
||||
#define __cold __attribute__((__cold__))
|
||||
|
||||
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
|
||||
|
||||
#define __optimize(level) __attribute__((__optimize__(level)))
|
||||
#define __nostackprotector __optimize("no-stack-protector")
|
||||
|
||||
#define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
|
||||
|
||||
|
|
|
|||
|
|
@ -14,10 +14,6 @@
|
|||
/* 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()
|
||||
|
|
@ -38,13 +34,12 @@
|
|||
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_BUILTIN_BSWAP16__
|
||||
/* icc has this, but it's called _bswap16 */
|
||||
#define __HAVE_BUILTIN_BSWAP16__
|
||||
#define __builtin_bswap16 _bswap16
|
||||
#endif
|
||||
|
||||
/*
|
||||
* icc defines __GNUC__, but does not implement the builtin overflow checkers.
|
||||
/* 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.
|
||||
*/
|
||||
#undef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW
|
||||
#define __visible __attribute__((externally_visible))
|
||||
|
|
|
|||
|
|
@ -54,32 +54,20 @@ extern void __chk_io_ptr(const volatile void __iomem *);
|
|||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#ifdef __GNUC__
|
||||
#include <linux/compiler-gcc.h>
|
||||
#endif
|
||||
|
||||
#if defined(CC_USING_HOTPATCH) && !defined(__CHECKER__)
|
||||
#define notrace __attribute__((hotpatch(0,0)))
|
||||
#else
|
||||
#define notrace __attribute__((no_instrument_function))
|
||||
#endif
|
||||
|
||||
/* Intel compiler defines __GNUC__. So we will overwrite implementations
|
||||
* coming from above header files here
|
||||
*/
|
||||
#ifdef __INTEL_COMPILER
|
||||
# include <linux/compiler-intel.h>
|
||||
#endif
|
||||
|
||||
/* Clang compiler defines __GNUC__. So we will overwrite implementations
|
||||
* coming from above header files here
|
||||
*/
|
||||
/* Compiler specific macros. */
|
||||
#ifdef __clang__
|
||||
#include <linux/compiler-clang.h>
|
||||
#elif defined(__INTEL_COMPILER)
|
||||
#include <linux/compiler-intel.h>
|
||||
#elif defined(__GNUC__)
|
||||
/* The above compilers also define __GNUC__, so order is important here. */
|
||||
#include <linux/compiler-gcc.h>
|
||||
#else
|
||||
#error "Unknown compiler"
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Generic compiler-dependent macros required for kernel
|
||||
* Generic compiler-independent macros required for kernel
|
||||
* build go below this comment. Actual compiler/compiler version
|
||||
* specific implementations come from the above header files
|
||||
*/
|
||||
|
|
@ -106,93 +94,19 @@ struct ftrace_likely_data {
|
|||
unsigned long constant;
|
||||
};
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
/* Don't. Just don't. */
|
||||
#define __deprecated
|
||||
#define __deprecated_for_modules
|
||||
|
||||
#ifndef __must_check
|
||||
#define __must_check
|
||||
#endif
|
||||
|
||||
#ifndef CONFIG_ENABLE_MUST_CHECK
|
||||
#undef __must_check
|
||||
#define __must_check
|
||||
#endif
|
||||
|
||||
#ifndef __malloc
|
||||
#define __malloc
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Allow us to avoid 'defined but not used' warnings on functions and data,
|
||||
* as well as force them to be emitted to the assembly file.
|
||||
*
|
||||
* As of gcc 3.4, static functions that are not marked with attribute((used))
|
||||
* may be elided from the assembly file. As of gcc 3.4, static data not so
|
||||
* marked will not be elided, but this may change in a future gcc version.
|
||||
*
|
||||
* NOTE: Because distributions shipped with a backported unit-at-a-time
|
||||
* compiler in gcc 3.3, we must define __used to be __attribute__((used))
|
||||
* for gcc >=3.3 instead of 3.4.
|
||||
*
|
||||
* In prior versions of gcc, such functions and data would be emitted, but
|
||||
* would be warned about except with attribute((unused)).
|
||||
*
|
||||
* Mark functions that are referenced only in inline assembly as __used so
|
||||
* the code is emitted even though it appears to be unreferenced.
|
||||
*/
|
||||
#ifndef __used
|
||||
# define __used /* unimplemented */
|
||||
#endif
|
||||
|
||||
#ifndef __maybe_unused
|
||||
# define __maybe_unused /* unimplemented */
|
||||
#endif
|
||||
|
||||
#ifndef __always_unused
|
||||
# define __always_unused /* unimplemented */
|
||||
#endif
|
||||
|
||||
#ifndef noinline
|
||||
#define noinline
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Rather then using noinline to prevent stack consumption, use
|
||||
* noinline_for_stack instead. For documentation reasons.
|
||||
*/
|
||||
#define noinline_for_stack noinline
|
||||
|
||||
#ifndef __always_inline
|
||||
#define __always_inline inline
|
||||
#endif
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
/*
|
||||
* From the GCC manual:
|
||||
*
|
||||
* Many functions do not examine any values except their arguments,
|
||||
* and have no effects except the return value. Basically this is
|
||||
* just slightly more strict class than the `pure' attribute above,
|
||||
* since function is not allowed to read global memory.
|
||||
*
|
||||
* Note that a function that has pointer arguments and examines the
|
||||
* data pointed to must _not_ be declared `const'. Likewise, a
|
||||
* function that calls a non-`const' function usually must not be
|
||||
* `const'. It does not make sense for a `const' function to return
|
||||
* `void'.
|
||||
*/
|
||||
#ifndef __attribute_const__
|
||||
# define __attribute_const__ /* unimplemented */
|
||||
#endif
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
||||
/*
|
||||
* The below symbols may be defined for one or more, but not ALL, of the above
|
||||
* compilers. We don't consider that to be an error, so set them to nothing.
|
||||
* For example, some of them are for compiler specific plugins.
|
||||
*/
|
||||
#ifndef __designated_init
|
||||
# define __designated_init
|
||||
#endif
|
||||
|
|
@ -214,28 +128,10 @@ struct ftrace_likely_data {
|
|||
# define randomized_struct_fields_end
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Tell gcc if a function is cold. The compiler will assume any path
|
||||
* directly leading to the call is unlikely.
|
||||
*/
|
||||
|
||||
#ifndef __cold
|
||||
#define __cold
|
||||
#endif
|
||||
|
||||
/* Simple shorthand for a section definition */
|
||||
#ifndef __section
|
||||
# define __section(S) __attribute__ ((__section__(#S)))
|
||||
#endif
|
||||
|
||||
#ifndef __visible
|
||||
#define __visible
|
||||
#endif
|
||||
|
||||
#ifndef __nostackprotector
|
||||
# define __nostackprotector
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Assume alignment of return value.
|
||||
*/
|
||||
|
|
@ -243,17 +139,23 @@ struct ftrace_likely_data {
|
|||
#define __assume_aligned(a, ...)
|
||||
#endif
|
||||
|
||||
|
||||
/* Are two types/vars the same type (ignoring qualifiers)? */
|
||||
#ifndef __same_type
|
||||
#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
|
||||
#endif
|
||||
|
||||
/* Is this type a native word size -- useful for atomic operations */
|
||||
#ifndef __native_word
|
||||
# define __native_word(t) (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
|
||||
#define __native_word(t) \
|
||||
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
|
||||
sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
|
||||
|
||||
#ifndef __attribute_const__
|
||||
#define __attribute_const__ __attribute__((__const__))
|
||||
#endif
|
||||
|
||||
#ifndef __noclone
|
||||
#define __noclone
|
||||
#endif
|
||||
|
||||
/* Helpers for emitting diagnostics in pragmas. */
|
||||
#ifndef __diag
|
||||
#define __diag(string)
|
||||
#endif
|
||||
|
|
@ -272,4 +174,92 @@ struct ftrace_likely_data {
|
|||
#define __diag_error(compiler, version, option, comment) \
|
||||
__diag_ ## compiler(version, error, option)
|
||||
|
||||
/*
|
||||
* From the GCC manual:
|
||||
*
|
||||
* Many functions have no effects except the return value and their
|
||||
* return value depends only on the parameters and/or global
|
||||
* variables. Such a function can be subject to common subexpression
|
||||
* elimination and loop optimization just as an arithmetic operator
|
||||
* would be.
|
||||
* [...]
|
||||
*/
|
||||
#define __pure __attribute__((pure))
|
||||
#define __aligned(x) __attribute__((aligned(x)))
|
||||
#define __aligned_largest __attribute__((aligned))
|
||||
#define __printf(a, b) __attribute__((format(printf, a, b)))
|
||||
#define __scanf(a, b) __attribute__((format(scanf, a, b)))
|
||||
#define __maybe_unused __attribute__((unused))
|
||||
#define __always_unused __attribute__((unused))
|
||||
#define __mode(x) __attribute__((mode(x)))
|
||||
#define __malloc __attribute__((__malloc__))
|
||||
#define __used __attribute__((__used__))
|
||||
#define __noreturn __attribute__((noreturn))
|
||||
#define __packed __attribute__((packed))
|
||||
#define __weak __attribute__((weak))
|
||||
#define __alias(symbol) __attribute__((alias(#symbol)))
|
||||
#define __cold __attribute__((cold))
|
||||
#define __section(S) __attribute__((__section__(#S)))
|
||||
|
||||
|
||||
#ifdef CONFIG_ENABLE_MUST_CHECK
|
||||
#define __must_check __attribute__((warn_unused_result))
|
||||
#else
|
||||
#define __must_check
|
||||
#endif
|
||||
|
||||
#if defined(CC_USING_HOTPATCH) && !defined(__CHECKER__)
|
||||
#define notrace __attribute__((hotpatch(0, 0)))
|
||||
#else
|
||||
#define notrace __attribute__((no_instrument_function))
|
||||
#endif
|
||||
|
||||
#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
|
||||
|
||||
/*
|
||||
* Feature detection for gnu_inline (gnu89 extern inline semantics). Either
|
||||
* __GNUC_STDC_INLINE__ is defined (not using gnu89 extern inline semantics,
|
||||
* and we opt in to the gnu89 semantics), or __GNUC_STDC_INLINE__ is not
|
||||
* defined so the gnu89 semantics are the default.
|
||||
*/
|
||||
#ifdef __GNUC_STDC_INLINE__
|
||||
# define __gnu_inline __attribute__((gnu_inline))
|
||||
#else
|
||||
# define __gnu_inline
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Force always-inline if the user requests it so via the .config.
|
||||
* GCC does not warn about unused static inline functions for
|
||||
* -Wunused-function. This turns out to avoid the need for complex #ifdef
|
||||
* directives. Suppress the warning in clang as well by using "unused"
|
||||
* function attribute, which is redundant but not harmful for gcc.
|
||||
* Prefer gnu_inline, so that extern inline functions do not emit an
|
||||
* externally visible function. This makes extern inline behave as per gnu89
|
||||
* semantics rather than c99. This prevents multiple symbol definition errors
|
||||
* of extern inline functions at link time.
|
||||
* A lot of inline functions can cause havoc with function tracing.
|
||||
*/
|
||||
#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \
|
||||
!defined(CONFIG_OPTIMIZE_INLINING)
|
||||
#define inline \
|
||||
inline __attribute__((always_inline, unused)) notrace __gnu_inline
|
||||
#else
|
||||
#define inline inline __attribute__((unused)) notrace __gnu_inline
|
||||
#endif
|
||||
|
||||
#define __inline__ inline
|
||||
#define __inline inline
|
||||
#define noinline __attribute__((noinline))
|
||||
|
||||
#ifndef __always_inline
|
||||
#define __always_inline inline __attribute__((always_inline))
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Rather then using noinline to prevent stack consumption, use
|
||||
* noinline_for_stack instead. For documentation reasons.
|
||||
*/
|
||||
#define noinline_for_stack noinline
|
||||
|
||||
#endif /* __LINUX_COMPILER_TYPES_H */
|
||||
|
|
|
|||
4
mm/ksm.c
4
mm/ksm.c
|
|
@ -652,9 +652,9 @@ static void remove_node_from_stable_tree(struct stable_node *stable_node)
|
|||
* list_head to stay clear from the rb_parent_color union
|
||||
* (aligned and different than any node) and also different
|
||||
* from &migrate_nodes. This will verify that future list.h changes
|
||||
* don't break STABLE_NODE_DUP_HEAD.
|
||||
* don't break STABLE_NODE_DUP_HEAD. Only recent gcc can handle it.
|
||||
*/
|
||||
#if GCC_VERSION >= 40903 /* only recent gcc can handle it */
|
||||
#if defined(GCC_VERSION) && GCC_VERSION >= 40903
|
||||
BUILD_BUG_ON(STABLE_NODE_DUP_HEAD <= &migrate_nodes);
|
||||
BUILD_BUG_ON(STABLE_NODE_DUP_HEAD >= &migrate_nodes + 1);
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -1131,7 +1131,8 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
|
|||
* gcc 4.7 and 4.8 on arm get an ICEs when inlining unmap_and_move(). Work
|
||||
* around it.
|
||||
*/
|
||||
#if (GCC_VERSION >= 40700 && GCC_VERSION < 40900) && defined(CONFIG_ARM)
|
||||
#if defined(CONFIG_ARM) && \
|
||||
defined(GCC_VERSION) && GCC_VERSION < 40900 && GCC_VERSION >= 40700
|
||||
#define ICE_noinline noinline
|
||||
#else
|
||||
#define ICE_noinline
|
||||
|
|
|
|||
Loading…
Reference in a new issue