The patch titled Subject: kernel: add support for gcc 5 has been added to the -mm tree. Its filename is kernel-add-support-for-gcc-5.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/kernel-add-support-for-gcc-5.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/kernel-add-support-for-gcc-5.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Sasha Levin <sasha.levin@xxxxxxxxxx> Subject: kernel: add support for gcc 5 We're missing include/linux/compiler-gcc5.h which is required now because gcc branched off to v5 in trunk. Just copy the relevant bits out of include/linux/compiler-gcc4.h, no new code is added as of now. This fixes a build error when using gcc 5. Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/compiler-gcc5.h | 66 ++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) diff -puN /dev/null include/linux/compiler-gcc5.h --- /dev/null +++ a/include/linux/compiler-gcc5.h @@ -0,0 +1,66 @@ +#ifndef __LINUX_COMPILER_H +#error "Please don't include <linux/compiler-gcc5.h> directly, include <linux/compiler.h> instead." +#endif + +#define __used __attribute__((__used__)) +#define __must_check __attribute__((warn_unused_result)) +#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__) + +#ifndef __CHECKER__ +# define __compiletime_warning(message) __attribute__((warning(message))) +# define __compiletime_error(message) __attribute__((error(message))) +#endif /* __CHECKER__ */ + +/* + * Mark a position in code as unreachable. This can be used to + * suppress control flow warnings after asm blocks that transfer + * control elsewhere. + * + * Early snapshots of gcc 4.5 don't support this and we can't detect + * this in the preprocessor, but we can live with this because they're + * unreleased. Really, we need to have autoconf for the kernel. + */ +#define unreachable() __builtin_unreachable() + +/* Mark a function definition as prohibited from being cloned. */ +#define __noclone __attribute__((__noclone__)) + +/* + * Tell the optimizer that something else uses this function or variable. + */ +#define __visible __attribute__((externally_visible)) + +/* + * GCC 'asm goto' miscompiles certain code sequences: + * + * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 + * + * Work it around via a compiler barrier quirk suggested by Jakub Jelinek. + * Fixed in GCC 4.8.2 and later versions. + * + * (asm goto is automatically volatile - the naming reflects this.) + */ +#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) + +#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP +#define __HAVE_BUILTIN_BSWAP32__ +#define __HAVE_BUILTIN_BSWAP64__ +#define __HAVE_BUILTIN_BSWAP16__ +#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ _ Patches currently in -mm which might be from sasha.levin@xxxxxxxxxx are mm-mmap-use-pr_emerg-when-printing-bug-related-information.patch kernel-add-support-for-gcc-5.patch mm-balloon_compaction-ignore-anonymous-pages.patch introduce-dump_vma.patch introduce-dump_vma-fix.patch introduce-dump_vma-fix-2.patch introduce-vm_bug_on_vma.patch convert-a-few-vm_bug_on-callers-to-vm_bug_on_vma.patch convert-a-few-vm_bug_on-callers-to-vm_bug_on_vma-checkpatch-fixes.patch mm-mmapc-clean-up-config_debug_vm_rb-checks.patch vmstat-on-demand-vmstat-workers-v8-fix-2.patch mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch do_shared_fault-check-that-mmap_sem-is-held.patch mm-replace-remap_file_pages-syscall-with-emulation.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html