--- /dev/null
+From 750b00a1ddae220403fd892a6fd4e0791ffd154a Mon Sep 17 00:00:00 2001
+From: "H.J. Lu" <hjl.tools@gmail.com>
+Date: Fri, 18 Sep 2020 07:55:14 -0700
+Subject: [PATCH] x86: Handle _SC_LEVEL1_ICACHE_LINESIZE [BZ #27444]
+
+ x86: Move x86 processor cache info to cpu_features
+
+missed _SC_LEVEL1_ICACHE_LINESIZE.
+
+1. Add level1_icache_linesize to struct cpu_features.
+2. Initialize level1_icache_linesize by calling handle_intel,
+handle_zhaoxin and handle_amd with _SC_LEVEL1_ICACHE_LINESIZE.
+3. Return level1_icache_linesize for _SC_LEVEL1_ICACHE_LINESIZE.
+
+Upstream-Status: Backport [https://sourceware.org/bugzilla/show_bug.cgi?id=27444]
+Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>
+---
+ sysdeps/x86/Makefile | 8 +++
+ sysdeps/x86/cacheinfo.c | 3 +
+ sysdeps/x86/dl-cacheinfo.h | 6 ++
+ sysdeps/x86/include/cpu-features.h | 2 +
+ .../x86/tst-sysconf-cache-linesize-static.c | 1 +
+ sysdeps/x86/tst-sysconf-cache-linesize.c | 57 +++++++++++++++++++
+ 6 files changed, 77 insertions(+)
+ create mode 100644 sysdeps/x86/tst-sysconf-cache-linesize-static.c
+ create mode 100644 sysdeps/x86/tst-sysconf-cache-linesize.c
+
+diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile
+index dd82674342..d231263051 100644
+--- a/sysdeps/x86/Makefile
++++ b/sysdeps/x86/Makefile
+@@ -208,3 +208,11 @@ $(objpfx)check-cet.out: $(..)sysdeps/x86/check-cet.awk \
+ generated += check-cet.out
+ endif
+ endif
++
++ifeq ($(subdir),posix)
++tests += \
++ tst-sysconf-cache-linesize \
++ tst-sysconf-cache-linesize-static
++tests-static += \
++ tst-sysconf-cache-linesize-static
++endif
+diff --git a/sysdeps/x86/cacheinfo.c b/sysdeps/x86/cacheinfo.c
+index 7b8df45e3b..5ea4723ca6 100644
+--- a/sysdeps/x86/cacheinfo.c
++++ b/sysdeps/x86/cacheinfo.c
+@@ -32,6 +32,9 @@ __cache_sysconf (int name)
+ case _SC_LEVEL1_ICACHE_SIZE:
+ return cpu_features->level1_icache_size;
+
++ case _SC_LEVEL1_ICACHE_LINESIZE:
++ return cpu_features->level1_icache_linesize;
++
+ case _SC_LEVEL1_DCACHE_SIZE:
+ return cpu_features->level1_dcache_size;
+
+diff --git a/sysdeps/x86/dl-cacheinfo.h b/sysdeps/x86/dl-cacheinfo.h
+index a31fa0783a..7cd00b92f1 100644
+--- a/sysdeps/x86/dl-cacheinfo.h
++++ b/sysdeps/x86/dl-cacheinfo.h
+@@ -707,6 +707,7 @@ dl_init_cacheinfo (struct cpu_features *cpu_features)
+ long int core;
+ unsigned int threads = 0;
+ unsigned long int level1_icache_size = -1;
++ unsigned long int level1_icache_linesize = -1;
+ unsigned long int level1_dcache_size = -1;
+ unsigned long int level1_dcache_assoc = -1;
+ unsigned long int level1_dcache_linesize = -1;
+@@ -726,6 +727,8 @@ dl_init_cacheinfo (struct cpu_features *cpu_features)
+
+ level1_icache_size
+ = handle_intel (_SC_LEVEL1_ICACHE_SIZE, cpu_features);
++ level1_icache_linesize
++ = handle_intel (_SC_LEVEL1_ICACHE_LINESIZE, cpu_features);
+ level1_dcache_size = data;
+ level1_dcache_assoc
+ = handle_intel (_SC_LEVEL1_DCACHE_ASSOC, cpu_features);
+@@ -753,6 +756,7 @@ dl_init_cacheinfo (struct cpu_features *cpu_features)
+ shared = handle_zhaoxin (_SC_LEVEL3_CACHE_SIZE);
+
+ level1_icache_size = handle_zhaoxin (_SC_LEVEL1_ICACHE_SIZE);
++ level1_icache_linesize = handle_zhaoxin (_SC_LEVEL1_ICACHE_LINESIZE);
+ level1_dcache_size = data;
+ level1_dcache_assoc = handle_zhaoxin (_SC_LEVEL1_DCACHE_ASSOC);
+ level1_dcache_linesize = handle_zhaoxin (_SC_LEVEL1_DCACHE_LINESIZE);
+@@ -772,6 +776,7 @@ dl_init_cacheinfo (struct cpu_features *cpu_features)
+ shared = handle_amd (_SC_LEVEL3_CACHE_SIZE);
+
+ level1_icache_size = handle_amd (_SC_LEVEL1_ICACHE_SIZE);
++ level1_icache_linesize = handle_amd (_SC_LEVEL1_ICACHE_LINESIZE);
+ level1_dcache_size = data;
+ level1_dcache_assoc = handle_amd (_SC_LEVEL1_DCACHE_ASSOC);
+ level1_dcache_linesize = handle_amd (_SC_LEVEL1_DCACHE_LINESIZE);
+@@ -833,6 +838,7 @@ dl_init_cacheinfo (struct cpu_features *cpu_features)
+ }
+
+ cpu_features->level1_icache_size = level1_icache_size;
++ cpu_features->level1_icache_linesize = level1_icache_linesize;
+ cpu_features->level1_dcache_size = level1_dcache_size;
+ cpu_features->level1_dcache_assoc = level1_dcache_assoc;
+ cpu_features->level1_dcache_linesize = level1_dcache_linesize;
+diff --git a/sysdeps/x86/include/cpu-features.h b/sysdeps/x86/include/cpu-features.h
+index 624736b40e..39a3f4f311 100644
+--- a/sysdeps/x86/include/cpu-features.h
++++ b/sysdeps/x86/include/cpu-features.h
+@@ -874,6 +874,8 @@ struct cpu_features
+ unsigned long int rep_stosb_threshold;
+ /* _SC_LEVEL1_ICACHE_SIZE. */
+ unsigned long int level1_icache_size;
++ /* _SC_LEVEL1_ICACHE_LINESIZE. */
++ unsigned long int level1_icache_linesize;
+ /* _SC_LEVEL1_DCACHE_SIZE. */
+ unsigned long int level1_dcache_size;
+ /* _SC_LEVEL1_DCACHE_ASSOC. */
+diff --git a/sysdeps/x86/tst-sysconf-cache-linesize-static.c b/sysdeps/x86/tst-sysconf-cache-linesize-static.c
+new file mode 100644
+index 0000000000..152ae68821
+--- /dev/null
++++ b/sysdeps/x86/tst-sysconf-cache-linesize-static.c
+@@ -0,0 +1 @@
++#include "tst-sysconf-cache-linesize.c"
+diff --git a/sysdeps/x86/tst-sysconf-cache-linesize.c b/sysdeps/x86/tst-sysconf-cache-linesize.c
+new file mode 100644
+index 0000000000..642dbde5d2
+--- /dev/null
++++ b/sysdeps/x86/tst-sysconf-cache-linesize.c
+@@ -0,0 +1,57 @@
++/* Test system cache line sizes.
++ Copyright (C) 2021 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
++ <https://www.gnu.org/licenses/>. */
++
++#include <stdio.h>
++#include <stdlib.h>
++#include <unistd.h>
++#include <array_length.h>
++
++static struct
++{
++ const char *name;
++ int _SC_val;
++} sc_options[] =
++ {
++#define N(name) { "_SC_"#name, _SC_##name }
++ N (LEVEL1_ICACHE_LINESIZE),
++ N (LEVEL1_DCACHE_LINESIZE),
++ N (LEVEL2_CACHE_LINESIZE)
++ };
++
++static int
++do_test (void)
++{
++ int result = EXIT_SUCCESS;
++
++ for (int i = 0; i < array_length (sc_options); ++i)
++ {
++ long int scret = sysconf (sc_options[i]._SC_val);
++ if (scret < 0)
++ {
++ printf ("sysconf (%s) returned < 0 (%ld)\n",
++ sc_options[i].name, scret);
++ result = EXIT_FAILURE;
++ }
++ else
++ printf ("sysconf (%s): %ld\n", sc_options[i].name, scret);
++ }
++
++ return result;
++}
++
++#include <support/test-driver.c>
