From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 47382 invoked by alias); 9 Nov 2017 05:33:54 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Received: (qmail 91142 invoked by uid 89); 9 Nov 2017 05:29:30 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-23.9 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,GIT_PATCH_0,GIT_PATCH_1,GIT_PATCH_2,GIT_PATCH_3,KAM_ASCII_DIVIDERS,RCVD_IN_DNSWL_NONE,RCVD_IN_SORBS_SPAM,SPF_PASS autolearn=ham version=3.3.2 spammy=H*F:U*pinskia, HX-Envelope-From:sk:pinskia X-Spam-User: qpsmtpd, 2 recipients X-HELO: mail-oi0-f67.google.com X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=3f1U/VfwQqA9M9V4dKzMuwz8FWl53OaAxfbAlBi5XN4=; b=WoXlBzKXsPB9mNZIgjmIaJJWX1CrlqoEo5e7fAeoAKf4bRJU2/Ny0Ocp+Kt2FbAliH 3szLNiwARcYP26jz5XHWFbXQIDNei8+qh0AoXDpD+P9gRDET6cbqFF/5qRzldqrREYTv JIDQdb77LMt/2D1OOlG2HY+GJT+Ze07v0ZAt+idjoej7732AAjpEl2E4p//dxSpseFUf Q/yJjev5vI8PljdIouGPhD+O2Gnl+rnoGgKYNpqGC5rPV27pJbmLiGrs1MZZQHRAgOC+ GNVwI3jGDMJ390kW1Sc18cJ4wTElb2kUIdMB48pEV/16ZmD9J9u1jtxDH1pmsfTiBDcO 1l+A== X-Gm-Message-State: AJaThX5gZ3NtzDmNeM4eKU/4lmwPkDDCQJAQKjo+Dew+gwqpYIwx/zxf jK083w2XWDif91ihze13jCGSOAN59vHrR9w3l1c= X-Google-Smtp-Source: AGs4zMbGa7XWFPml0c4czy+jreBjwnKK801bp3zqd2+flBoXcQHw9YSYOJeiKLk+jwqmtCc2l7fs0C/dl119Dd4fgDE= X-Received: by 10.202.60.133 with SMTP id j127mr78608oia.67.1510205360748; Wed, 08 Nov 2017 21:29:20 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <1510204408-1739-4-git-send-email-siddhesh@sourceware.org> References: <1510204408-1739-1-git-send-email-siddhesh@sourceware.org> <1510204408-1739-4-git-send-email-siddhesh@sourceware.org> From: Andrew Pinski Date: Thu, 09 Nov 2017 05:33:00 -0000 Message-ID: Subject: Re: [PATCH 3/3] aarch64: Hoist ZVA check out of the memset function To: Siddhesh Poyarekar Cc: GNU C Library , Wilco Dijkstra , Szabolcs Nagy Content-Type: text/plain; charset="UTF-8" X-SW-Source: 2017-11/txt/msg00303.txt.bz2 On Wed, Nov 8, 2017 at 9:13 PM, Siddhesh Poyarekar wrote: > The DZP bit in the dczid_el0 register does not change dynamically, so > it is safe to read once during program startup. Hoist the zva check > into an ifunc resolver to optimize for the most common zva size > i.e. 64 bytes. I have retained the older memset as __memset_generic > for internal libc.so use so that the change impact is minimal. We > should eventually have a discussion on what is more expensive, reading > dczid_el0 on every memset invocation or the indirection due to PLT. > > The gains due to this are significant for falkor, with run time > reductions as high as 48% in some cases. Likewise for mustang, > although the numbers are slightly lower. Here's a sample from the > falkor tests: I don't like this at all for the increase file size for the not so significant gain on real platforms. I think we should declare falkor micro-arch is broken and move on. Thanks, Andrew > > Function: memset > Variant: walk > simple_memset __memset_zva_64 __memset_generic > ====================================================================================================== > length=256, char=0: 139.96 (-698.28%) 9.07 ( 48.26%) 17.53 > length=257, char=0: 140.50 (-699.03%) 9.53 ( 45.80%) 17.58 > length=258, char=0: 140.96 (-703.95%) 9.58 ( 45.36%) 17.53 > length=259, char=0: 141.56 (-705.16%) 9.53 ( 45.79%) 17.58 > length=260, char=0: 142.15 (-710.76%) 9.57 ( 45.39%) 17.53 > length=261, char=0: 142.50 (-710.39%) 9.53 ( 45.78%) 17.58 > length=262, char=0: 142.97 (-715.09%) 9.57 ( 45.42%) 17.54 > length=263, char=0: 143.51 (-716.18%) 9.53 ( 45.80%) 17.58 > length=264, char=0: 143.93 (-720.55%) 9.58 ( 45.39%) 17.54 > length=265, char=0: 144.56 (-722.07%) 9.53 ( 45.80%) 17.59 > length=266, char=0: 144.98 (-726.42%) 9.58 ( 45.42%) 17.54 > length=267, char=0: 145.53 (-727.53%) 9.53 ( 45.80%) 17.59 > length=268, char=0: 146.25 (-731.81%) 9.53 ( 45.79%) 17.58 > length=269, char=0: 146.52 (-735.39%) 9.53 ( 45.66%) 17.54 > length=270, char=0: 146.97 (-735.81%) 9.53 ( 45.80%) 17.58 > length=271, char=0: 147.54 (-741.08%) 9.58 ( 45.38%) 17.54 > length=512, char=0: 268.26 (-1307.85%) 12.06 ( 36.71%) 19.05 > length=513, char=0: 268.73 (-1273.89%) 13.56 ( 30.68%) 19.56 > length=514, char=0: 269.31 (-1276.89%) 13.56 ( 30.68%) 19.56 > length=515, char=0: 269.73 (-1279.05%) 13.56 ( 30.68%) 19.56 > length=516, char=0: 270.34 (-1282.24%) 13.56 ( 30.67%) 19.56 > length=517, char=0: 270.83 (-1284.71%) 13.56 ( 30.66%) 19.56 > length=518, char=0: 271.20 (-1286.54%) 13.56 ( 30.67%) 19.56 > length=519, char=0: 271.67 (-1288.67%) 13.65 ( 30.24%) 19.56 > length=520, char=0: 272.14 (-1291.04%) 13.65 ( 30.22%) 19.56 > length=521, char=0: 272.66 (-1293.69%) 13.65 ( 30.23%) 19.56 > length=522, char=0: 273.14 (-1296.13%) 13.65 ( 30.20%) 19.56 > length=523, char=0: 273.64 (-1298.75%) 13.65 ( 30.23%) 19.56 > length=524, char=0: 274.34 (-1302.16%) 13.66 ( 30.20%) 19.57 > length=525, char=0: 274.64 (-1297.78%) 13.56 ( 30.99%) 19.65 > length=526, char=0: 275.20 (-1300.04%) 13.56 ( 31.01%) 19.66 > length=527, char=0: 275.66 (-1302.86%) 13.56 ( 30.99%) 19.65 > length=1024, char=0: 524.46 (-2169.75%) 20.12 ( 12.92%) 23.11 > length=1025, char=0: 525.14 (-2124.63%) 21.62 ( 8.40%) 23.61 > length=1026, char=0: 525.59 (-2125.36%) 21.88 ( 7.37%) 23.62 > length=1027, char=0: 525.98 (-2127.14%) 21.62 ( 8.46%) 23.62 > length=1028, char=0: 526.68 (-2131.10%) 21.62 ( 8.42%) 23.61 > length=1029, char=0: 527.10 (-2131.70%) 21.79 ( 7.73%) 23.62 > length=1030, char=0: 527.54 (-2118.51%) 21.62 ( 9.10%) 23.78 > length=1031, char=0: 527.98 (-2136.37%) 21.62 ( 8.43%) 23.61 > length=1032, char=0: 528.70 (-2139.38%) 21.62 ( 8.43%) 23.61 > length=1033, char=0: 529.25 (-2124.37%) 21.62 ( 9.11%) 23.79 > length=1034, char=0: 529.48 (-2142.95%) 21.62 ( 8.43%) 23.61 > length=1035, char=0: 530.11 (-2145.13%) 21.62 ( 8.44%) 23.61 > length=1036, char=0: 530.76 (-2147.10%) 21.79 ( 7.73%) 23.62 > length=1037, char=0: 531.03 (-2149.45%) 21.62 ( 8.42%) 23.61 > length=1038, char=0: 531.64 (-2151.87%) 21.62 ( 8.42%) 23.61 > length=1039, char=0: 531.99 (-2151.63%) 21.80 ( 7.75%) 23.63 > > * sysdeps/aarch64/memset-reg.h: New file. > * sysdeps/aarch64/memset.S: Use it. > (__memset): Rename to MEMSET macro. > [ZVA_MACRO]: Use zva_macro. > * sysdeps/aarch64/multiarch/Makefile (sysdep_routines): > Add memset_generic and memset_zva_64. > * sysdeps/aarch64/multiarch/ifunc-impl-list.c > (__libc_ifunc_impl_list): Add memset ifuncs. > * sysdeps/aarch64/multiarch/init-arch.h (INIT_ARCH): New > local variable zva_size. > * sysdeps/aarch64/multiarch/memset.c: New file. > * sysdeps/aarch64/multiarch/memset_generic.S: New file. > * sysdeps/aarch64/multiarch/memset_zva_64.S: New file. > * sysdeps/aarch64/multiarch/rtld-memset.S: New file. > * sysdeps/unix/sysv/linux/aarch64/cpu-features.c > (DCZID_DZP_MASK): New macro. > (DCZID_BS_MASK): Likewise. > (init_cpu_features): Read and set zva_size. > * sysdeps/unix/sysv/linux/aarch64/cpu-features.h > (struct cpu_features): New member zva_size. > --- > sysdeps/aarch64/memset-reg.h | 30 ++++++++++++++++ > sysdeps/aarch64/memset.S | 27 +++++--------- > sysdeps/aarch64/multiarch/Makefile | 2 +- > sysdeps/aarch64/multiarch/ifunc-impl-list.c | 3 ++ > sysdeps/aarch64/multiarch/init-arch.h | 8 +++-- > sysdeps/aarch64/multiarch/memset.c | 41 +++++++++++++++++++++ > sysdeps/aarch64/multiarch/memset_generic.S | 27 ++++++++++++++ > sysdeps/aarch64/multiarch/memset_zva_64.S | 49 ++++++++++++++++++++++++++ > sysdeps/aarch64/multiarch/rtld-memset.S | 23 ++++++++++++ > sysdeps/unix/sysv/linux/aarch64/cpu-features.c | 10 ++++++ > sysdeps/unix/sysv/linux/aarch64/cpu-features.h | 1 + > 11 files changed, 199 insertions(+), 22 deletions(-) > create mode 100644 sysdeps/aarch64/memset-reg.h > create mode 100644 sysdeps/aarch64/multiarch/memset.c > create mode 100644 sysdeps/aarch64/multiarch/memset_generic.S > create mode 100644 sysdeps/aarch64/multiarch/memset_zva_64.S > create mode 100644 sysdeps/aarch64/multiarch/rtld-memset.S > > diff --git a/sysdeps/aarch64/memset-reg.h b/sysdeps/aarch64/memset-reg.h > new file mode 100644 > index 0000000..518e562 > --- /dev/null > +++ b/sysdeps/aarch64/memset-reg.h > @@ -0,0 +1,30 @@ > +/* Register aliases for memset to be used across implementations. > + Copyright (C) 2017 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library; if not, see > + . */ > + > +#define dstin x0 > +#define val x1 > +#define valw w1 > +#define count x2 > +#define dst x3 > +#define dstend x4 > +#define tmp1 x5 > +#define tmp1w w5 > +#define tmp2 x6 > +#define tmp2w w6 > +#define zva_len x7 > +#define zva_lenw w7 > diff --git a/sysdeps/aarch64/memset.S b/sysdeps/aarch64/memset.S > index 110fd22..45fb0a8 100644 > --- a/sysdeps/aarch64/memset.S > +++ b/sysdeps/aarch64/memset.S > @@ -17,6 +17,7 @@ > . */ > > #include > +#include "memset-reg.h" > > /* Assumptions: > * > @@ -24,20 +25,7 @@ > * > */ > > -#define dstin x0 > -#define val x1 > -#define valw w1 > -#define count x2 > -#define dst x3 > -#define dstend x4 > -#define tmp1 x5 > -#define tmp1w w5 > -#define tmp2 x6 > -#define tmp2w w6 > -#define zva_len x7 > -#define zva_lenw w7 > - > -ENTRY_ALIGN (__memset, 6) > +ENTRY_ALIGN (MEMSET, 6) > > DELOUSE (0) > DELOUSE (2) > @@ -108,8 +96,11 @@ L(tail64): > stp q0, q0, [dstend, -32] > ret > > - .p2align 3 > L(try_zva): > +#ifdef ZVA_MACRO > + zva_macro > +#else > + .p2align 3 > mrs tmp1, dczid_el0 > tbnz tmp1w, 4, L(no_zva) > and tmp1w, tmp1w, 15 > @@ -189,7 +180,7 @@ L(zva_other): > b.hs 3b > 4: add count, count, zva_len > b L(tail64) > +#endif > > -END (__memset) > -weak_alias (__memset, memset) > -libc_hidden_builtin_def (memset) > +END (MEMSET) > +libc_hidden_builtin_def (MEMSET) > diff --git a/sysdeps/aarch64/multiarch/Makefile b/sysdeps/aarch64/multiarch/Makefile > index 9aa1e79..57a6c8b 100644 > --- a/sysdeps/aarch64/multiarch/Makefile > +++ b/sysdeps/aarch64/multiarch/Makefile > @@ -1,4 +1,4 @@ > ifeq ($(subdir),string) > sysdep_routines += memcpy_generic memcpy_thunderx memcpy_falkor \ > - memmove_falkor > + memmove_falkor memset_generic memset_zva_64 > endif > diff --git a/sysdeps/aarch64/multiarch/ifunc-impl-list.c b/sysdeps/aarch64/multiarch/ifunc-impl-list.c > index 2cb74d5..a8c2f6d 100644 > --- a/sysdeps/aarch64/multiarch/ifunc-impl-list.c > +++ b/sysdeps/aarch64/multiarch/ifunc-impl-list.c > @@ -46,6 +46,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, > IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_thunderx) > IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_falkor) > IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_generic)) > + IFUNC_IMPL (i, name, memset, > + IFUNC_IMPL_ADD (array, i, memset, (zva_size == 64), __memset_zva_64) > + IFUNC_IMPL_ADD (array, i, memset, 1, __memset_generic)) > > return i; > } > diff --git a/sysdeps/aarch64/multiarch/init-arch.h b/sysdeps/aarch64/multiarch/init-arch.h > index 3af442c..a756dad 100644 > --- a/sysdeps/aarch64/multiarch/init-arch.h > +++ b/sysdeps/aarch64/multiarch/init-arch.h > @@ -18,6 +18,8 @@ > > #include > > -#define INIT_ARCH() \ > - uint64_t __attribute__((unused)) midr = \ > - GLRO(dl_aarch64_cpu_features).midr_el1; > +#define INIT_ARCH() \ > + uint64_t __attribute__((unused)) midr = \ > + GLRO(dl_aarch64_cpu_features).midr_el1; \ > + unsigned __attribute__((unused)) zva_size = \ > + GLRO(dl_aarch64_cpu_features).zva_size; > diff --git a/sysdeps/aarch64/multiarch/memset.c b/sysdeps/aarch64/multiarch/memset.c > new file mode 100644 > index 0000000..fcaa376 > --- /dev/null > +++ b/sysdeps/aarch64/multiarch/memset.c > @@ -0,0 +1,41 @@ > +/* Multiple versions of memset. AARCH64 version. > + Copyright (C) 2017 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library; if not, see > + . */ > + > +/* Define multiple versions only for the definition in libc. */ > + > +#if IS_IN (libc) > +/* Redefine memset so that the compiler won't complain about the type > + mismatch with the IFUNC selector in strong_alias, below. */ > +# undef memset > +# define memset __redirect_memset > +# include > +# include > + > +extern __typeof (__redirect_memset) __libc_memset; > + > +extern __typeof (__redirect_memset) __memset_nozva attribute_hidden; > +extern __typeof (__redirect_memset) __memset_zva_64 attribute_hidden; > +extern __typeof (__redirect_memset) __memset_zva_128 attribute_hidden; > +extern __typeof (__redirect_memset) __memset_generic attribute_hidden; > + > +libc_ifunc (__libc_memset, (zva_size == 64 ? __memset_zva_64 > + : __memset_generic)); > + > +# undef memset > +strong_alias (__libc_memset, memset); > +#endif > diff --git a/sysdeps/aarch64/multiarch/memset_generic.S b/sysdeps/aarch64/multiarch/memset_generic.S > new file mode 100644 > index 0000000..55134ed > --- /dev/null > +++ b/sysdeps/aarch64/multiarch/memset_generic.S > @@ -0,0 +1,27 @@ > +/* Memset for aarch64, default version for internal use. > + Copyright (C) 2017 Free Software Foundation, Inc. > + > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + . */ > + > +#if IS_IN (libc) > +# define MEMSET __memset_generic > +/* Add a hidden definition for use within libc.so. */ > +# ifdef SHARED > + .globl __GI_memset; __GI_memset = __memset_generic > +# endif > +# include > +#endif > diff --git a/sysdeps/aarch64/multiarch/memset_zva_64.S b/sysdeps/aarch64/multiarch/memset_zva_64.S > new file mode 100644 > index 0000000..bb9f140 > --- /dev/null > +++ b/sysdeps/aarch64/multiarch/memset_zva_64.S > @@ -0,0 +1,49 @@ > +/* Memset for zva size of 64 bytes. > + Copyright (C) 2017 Free Software Foundation, Inc. > + > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + . */ > + > +#include > + > +#if IS_IN (libc) > +.macro zva_macro > + .p2align 4 > + /* Write the first and last 64 byte aligned block using stp rather > + than using DC ZVA. This is faster on some cores. */ > + str q0, [dst, 16] > + stp q0, q0, [dst, 32] > + bic dst, dst, 63 > + stp q0, q0, [dst, 64] > + stp q0, q0, [dst, 96] > + sub count, dstend, dst /* Count is now 128 too large. */ > + sub count, count, 128+64+64 /* Adjust count and bias for loop. */ > + add dst, dst, 128 > +1: dc zva, dst > + add dst, dst, 64 > + subs count, count, 64 > + b.hi 1b > + stp q0, q0, [dst, 0] > + stp q0, q0, [dst, 32] > + stp q0, q0, [dstend, -64] > + stp q0, q0, [dstend, -32] > + ret > +.endm > + > +# define ZVA_MACRO zva_macro > +# define MEMSET __memset_zva_64 > +# include > +#endif > diff --git a/sysdeps/aarch64/multiarch/rtld-memset.S b/sysdeps/aarch64/multiarch/rtld-memset.S > new file mode 100644 > index 0000000..4437393 > --- /dev/null > +++ b/sysdeps/aarch64/multiarch/rtld-memset.S > @@ -0,0 +1,23 @@ > +/* Memset for aarch64, for the dynamic linker. > + Copyright (C) 2017 Free Software Foundation, Inc. > + > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + . */ > + > +#if IS_IN (rtld) > +# define MEMSET memset > +# include > +#endif > diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c > index e769eeb..092ee81 100644 > --- a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c > +++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c > @@ -20,6 +20,9 @@ > #include > #include > > +#define DCZID_DZP_MASK (1 << 4) > +#define DCZID_BS_MASK (0xf) > + > #if HAVE_TUNABLES > struct cpu_list > { > @@ -72,4 +75,11 @@ init_cpu_features (struct cpu_features *cpu_features) > } > > cpu_features->midr_el1 = midr; > + > + /* Check if ZVA is enabled. */ > + unsigned dczid; > + asm volatile ("mrs %0, dczid_el0" : "=r"(dczid)); > + > + if ((dczid & DCZID_DZP_MASK) == 0) > + cpu_features->zva_size = 4 << (dczid & DCZID_BS_MASK); > } > diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.h b/sysdeps/unix/sysv/linux/aarch64/cpu-features.h > index 73cb53d..f2b6afd 100644 > --- a/sysdeps/unix/sysv/linux/aarch64/cpu-features.h > +++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.h > @@ -47,6 +47,7 @@ > struct cpu_features > { > uint64_t midr_el1; > + unsigned zva_size; > }; > > #endif /* _CPU_FEATURES_AARCH64_H */ > -- > 2.7.5 >