mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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ff1ebfd98d
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJXXS5iAAoJEE44bZycYXAvDj8P/jbhmGAgW6tw2cnS90QIZDqG M/nclEId61jICNvbfP6zsioKeWyrmzr5G7NjqTThsSNhCo/DXs3ddMqLy3pOaFdq mytXtHIUpwZoplEib+ODinW40CMqnu11XSWEcee2nrsPuGNsnc7BY0wmFBa6UVCV rOZef9SN9lJcZSYY/auvgLDXOXdQ+NMxp5hau30aF5HBO8hTDXStjPRcUwCvz7aR govTQJHlS4HzLH3JOYS3Dt8IYFDOrKhQIby2nFdw7eiUxHCRy2F0asabTh3DzCw1 iLvFroozjyVXwozfWMqLCvMa+514MXJy8Nkva6xiAHraC8UrgfPtcNsTdgtkdH9T V2Am9b0L7yiBdG6hsZLxkU3akk7vU/0dtppwzvudANT6i2tGcDSBeaZq3T2pAv7B 7coY53GzHZdQnbdTZbYeS1fxebxyXw50D5OJkF8DyLhoL7Uj2Dvv0QdjKv+U/e5D VQ+ZyGcBdCLuOzflXysI10E01y0/M3FrkubgGBM4Oh0eYKCHJaHG/NCZy5JY/qxy S0phem8RbeZPbcL14z+5buWIi1lUkTiCIMG8c32ZEmDh84drnICqABA0RzKmqdkj ucQa+PzkMQ1DyhAMUl/CwpBfSqf1Zs3agLo78Kp5MTGfeAA90m0SeVqhmDgWhwqG HhSlsPFfMfmJl5S0uJpQ =UhFl -----END PGP SIGNATURE----- Merge tag 'v3.10.102' into HEAD This is the 3.10.102 stable release Change-Id: Ic7d338fb190966b26aa151361fc37414f701d8b2
225 lines
7.4 KiB
C
225 lines
7.4 KiB
C
#ifndef __LINUX_COMPILER_H
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#error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
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#endif
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/*
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* Common definitions for all gcc versions go here.
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*/
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#define GCC_VERSION (__GNUC__ * 10000 \
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+ __GNUC_MINOR__ * 100 \
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+ __GNUC_PATCHLEVEL__)
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/* Optimization barrier */
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/* The "volatile" is due to gcc bugs */
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#define barrier() __asm__ __volatile__("": : :"memory")
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/*
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* This macro obfuscates arithmetic on a variable address so that gcc
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* shouldn't recognize the original var, and make assumptions about it.
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*
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* This is needed because the C standard makes it undefined to do
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* pointer arithmetic on "objects" outside their boundaries and the
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* gcc optimizers assume this is the case. In particular they
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* assume such arithmetic does not wrap.
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*
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* A miscompilation has been observed because of this on PPC.
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* To work around it we hide the relationship of the pointer and the object
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* using this macro.
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*
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* Versions of the ppc64 compiler before 4.1 had a bug where use of
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* RELOC_HIDE could trash r30. The bug can be worked around by changing
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* the inline assembly constraint from =g to =r, in this particular
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* case either is valid.
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*/
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#define RELOC_HIDE(ptr, off) \
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({ unsigned long __ptr; \
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__asm__ ("" : "=r"(__ptr) : "0"(ptr)); \
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(typeof(ptr)) (__ptr + (off)); })
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/* Make the optimizer believe the variable can be manipulated arbitrarily. */
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#define OPTIMIZER_HIDE_VAR(var) __asm__ ("" : "=r" (var) : "0" (var))
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#ifdef __CHECKER__
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#define __must_be_array(arr) 0
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#else
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/* &a[0] degrades to a pointer: a different type from an array */
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#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
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#endif
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/*
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* Force always-inline if the user requests it so via the .config,
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* or if gcc is too old:
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*/
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#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \
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!defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
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# define inline inline __attribute__((always_inline)) notrace
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# define __inline__ __inline__ __attribute__((always_inline)) notrace
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# define __inline __inline __attribute__((always_inline)) notrace
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#else
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/* A lot of inline functions can cause havoc with function tracing */
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# define inline inline notrace
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# define __inline__ __inline__ notrace
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# define __inline __inline notrace
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#endif
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#define __deprecated __attribute__((deprecated))
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#define __packed __attribute__((packed))
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#define __weak __attribute__((weak))
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#define __alias(symbol) __attribute__((alias(#symbol)))
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/*
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* it doesn't make sense on ARM (currently the only user of __naked) to trace
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* naked functions because then mcount is called without stack and frame pointer
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* being set up and there is no chance to restore the lr register to the value
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* before mcount was called.
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*
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* The asm() bodies of naked functions often depend on standard calling conventions,
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* therefore they must be noinline and noclone. GCC 4.[56] currently fail to enforce
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* this, so we must do so ourselves. See GCC PR44290.
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*/
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#define __naked __attribute__((naked)) noinline __noclone notrace
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#define __noreturn __attribute__((noreturn))
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/*
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* From the GCC manual:
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*
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* Many functions have no effects except the return value and their
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* return value depends only on the parameters and/or global
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* variables. Such a function can be subject to common subexpression
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* elimination and loop optimization just as an arithmetic operator
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* would be.
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* [...]
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*/
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#define __pure __attribute__((pure))
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#define __aligned(x) __attribute__((aligned(x)))
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#define __printf(a, b) __attribute__((format(printf, a, b)))
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#define __scanf(a, b) __attribute__((format(scanf, a, b)))
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#define noinline __attribute__((noinline))
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#define __attribute_const__ __attribute__((__const__))
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#define __maybe_unused __attribute__((unused))
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#define __always_unused __attribute__((unused))
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/* gcc version specific checks */
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#if GCC_VERSION < 30200
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# error Sorry, your compiler is too old - please upgrade it.
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#endif
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#if GCC_VERSION < 30300
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# define __used __attribute__((__unused__))
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#else
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# define __used __attribute__((__used__))
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#endif
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#ifdef CONFIG_GCOV_KERNEL
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# if GCC_VERSION < 30400
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# error "GCOV profiling support for gcc versions below 3.4 not included"
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# endif /* __GNUC_MINOR__ */
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#endif /* CONFIG_GCOV_KERNEL */
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#if GCC_VERSION >= 30400
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#define __must_check __attribute__((warn_unused_result))
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#endif
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#if GCC_VERSION >= 40000
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/* GCC 4.1.[01] miscompiles __weak */
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#ifdef __KERNEL__
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# if GCC_VERSION >= 40100 && GCC_VERSION <= 40101
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# error Your version of gcc miscompiles the __weak directive
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# endif
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#endif
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#define __used __attribute__((__used__))
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#define __compiler_offsetof(a, b) \
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__builtin_offsetof(a, b)
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#if GCC_VERSION >= 40100 && GCC_VERSION < 40600
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# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
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#endif
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#if GCC_VERSION >= 40300
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/* Mark functions as cold. gcc will assume any path leading to a call
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* to them will be unlikely. This means a lot of manual unlikely()s
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* are unnecessary now for any paths leading to the usual suspects
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* like BUG(), printk(), panic() etc. [but let's keep them for now for
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* older compilers]
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*
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* Early snapshots of gcc 4.3 don't support this and we can't detect this
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* in the preprocessor, but we can live with this because they're unreleased.
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* Maketime probing would be overkill here.
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*
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* gcc also has a __attribute__((__hot__)) to move hot functions into
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* a special section, but I don't see any sense in this right now in
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* the kernel context
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*/
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#define __cold __attribute__((__cold__))
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#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
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#ifndef __CHECKER__
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# define __compiletime_warning(message) __attribute__((warning(message)))
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# define __compiletime_error(message) __attribute__((error(message)))
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#endif /* __CHECKER__ */
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#endif /* GCC_VERSION >= 40300 */
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#if GCC_VERSION >= 40500
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/*
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* Mark a position in code as unreachable. This can be used to
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* suppress control flow warnings after asm blocks that transfer
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* control elsewhere.
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*
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* Early snapshots of gcc 4.5 don't support this and we can't detect
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* this in the preprocessor, but we can live with this because they're
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* unreleased. Really, we need to have autoconf for the kernel.
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*/
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#define unreachable() __builtin_unreachable()
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/* Mark a function definition as prohibited from being cloned. */
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#define __noclone __attribute__((__noclone__, __optimize__("no-tracer")))
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#endif /* GCC_VERSION >= 40500 */
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#if GCC_VERSION >= 40600
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/*
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* Tell the optimizer that something else uses this function or variable.
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*/
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#define __visible __attribute__((externally_visible))
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#endif
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/*
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* GCC 'asm goto' miscompiles certain code sequences:
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*
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* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
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*
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* Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
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*
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* (asm goto is automatically volatile - the naming reflects this.)
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*/
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#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
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#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
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#if GCC_VERSION >= 40400
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#define __HAVE_BUILTIN_BSWAP32__
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#define __HAVE_BUILTIN_BSWAP64__
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#endif
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#if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600)
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#define __HAVE_BUILTIN_BSWAP16__
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#endif
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#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
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#endif /* gcc version >= 40000 specific checks */
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#if !defined(__noclone)
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#define __noclone /* not needed */
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#endif
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/*
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* A trick to suppress uninitialized variable warning without generating any
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* code
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*/
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#define uninitialized_var(x) x = x
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#define __always_inline inline __attribute__((always_inline))
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