[arch-commits] Commit in linux/trunk (3 files)
Tobias Powalowski
tpowa at nymeria.archlinux.org
Thu Feb 13 19:58:33 UTC 2014
Date: Thursday, February 13, 2014 @ 20:58:32
Author: tpowa
Revision: 205907
upgpkg: linux 3.13.2-3
add correct patch for asm issues
Added:
linux/trunk/0001-quirk-asm_volatile_goto.patch
Modified:
linux/trunk/PKGBUILD
Deleted:
linux/trunk/0001-revert-avmfritz-breaker.patch
------------------------------------+
0001-quirk-asm_volatile_goto.patch | 51 ++++
0001-revert-avmfritz-breaker.patch | 417 -----------------------------------
PKGBUILD | 13 -
3 files changed, 57 insertions(+), 424 deletions(-)
Added: 0001-quirk-asm_volatile_goto.patch
===================================================================
--- 0001-quirk-asm_volatile_goto.patch (rev 0)
+++ 0001-quirk-asm_volatile_goto.patch 2014-02-13 19:58:32 UTC (rev 205907)
@@ -0,0 +1,51 @@
+From a9f180345f5378ac87d80ed0bea55ba421d83859 Mon Sep 17 00:00:00 2001
+From: Steven Noonan <steven at uplinklabs.net>
+Date: Thu, 13 Feb 2014 07:01:07 +0000
+Subject: compiler/gcc4: Make quirk for asm_volatile_goto() unconditional
+
+I started noticing problems with KVM guest destruction on Linux
+3.12+, where guest memory wasn't being cleaned up. I bisected it
+down to the commit introducing the new 'asm goto'-based atomics,
+and found this quirk was later applied to those.
+
+Unfortunately, even with GCC 4.8.2 (which ostensibly fixed the
+known 'asm goto' bug) I am still getting some kind of
+miscompilation. If I enable the asm_volatile_goto quirk for my
+compiler, KVM guests are destroyed correctly and the memory is
+cleaned up.
+
+So make the quirk unconditional for now, until bug is found
+and fixed.
+
+Suggested-by: Linus Torvalds <torvalds at linux-foundation.org>
+Signed-off-by: Steven Noonan <steven at uplinklabs.net>
+Cc: Peter Zijlstra <peterz at infradead.org>
+Cc: Steven Rostedt <rostedt at goodmis.org>
+Cc: Jakub Jelinek <jakub at redhat.com>
+Cc: Richard Henderson <rth at twiddle.net>
+Cc: Andrew Morton <akpm at linux-foundation.org>
+Cc: Oleg Nesterov <oleg at redhat.com>
+Cc: <stable at vger.kernel.org>
+Link: http://lkml.kernel.org/r/1392274867-15236-1-git-send-email-steven@uplinklabs.net
+Link: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
+Signed-off-by: Ingo Molnar <mingo at kernel.org>
+---
+diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
+index ded4299..2507fd2 100644
+--- a/include/linux/compiler-gcc4.h
++++ b/include/linux/compiler-gcc4.h
+@@ -75,11 +75,7 @@
+ *
+ * (asm goto is automatically volatile - the naming reflects this.)
+ */
+-#if GCC_VERSION <= 40801
+-# define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
+-#else
+-# define asm_volatile_goto(x...) do { asm goto(x); } while (0)
+-#endif
++#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
+
+ #ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
+ #if GCC_VERSION >= 40400
+--
+cgit v0.9.2
Deleted: 0001-revert-avmfritz-breaker.patch
===================================================================
--- 0001-revert-avmfritz-breaker.patch 2014-02-13 18:15:29 UTC (rev 205906)
+++ 0001-revert-avmfritz-breaker.patch 2014-02-13 19:58:32 UTC (rev 205907)
@@ -1,417 +0,0 @@
-From e0f6dec35f9286e78879fe1ac92803fd69fc4fdc Mon Sep 17 00:00:00 2001
-From: H. Peter Anvin <hpa at linux.intel.com>
-Date: Wed, 04 Dec 2013 22:31:28 +0000
-Subject: x86, bitops: Correct the assembly constraints to testing bitops
-
-In checkin:
-
-0c44c2d0f459 x86: Use asm goto to implement better modify_and_test() functions
-
-the various functions which do modify and test were unified and
-optimized using "asm goto". However, this change missed the detail
-that the bitops require an "Ir" constraint rather than an "er"
-constraint ("I" = integer constant from 0-31, "e" = signed 32-bit
-integer constant). This would cause code to miscompile if these
-functions were used on constant bit positions 32-255 and the build to
-fail if used on constant bit positions above 255.
-
-Add the constraints as a parameter to the GEN_BINARY_RMWcc() macro to
-avoid this problem.
-
-Reported-by: Jesse Brandeburg <jesse.brandeburg at intel.com>
-Signed-off-by: H. Peter Anvin <hpa at linux.intel.com>
-Cc: Peter Zijlstra <peterz at infradead.org>
-Link: http://lkml.kernel.org/r/529E8719.4070202@zytor.com
----
-diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
-index da31c8b..b17f4f4 100644
---- a/arch/x86/include/asm/atomic.h
-+++ b/arch/x86/include/asm/atomic.h
-@@ -77,7 +77,7 @@ static inline void atomic_sub(int i, atomic_t *v)
- */
- static inline int atomic_sub_and_test(int i, atomic_t *v)
- {
-- GEN_BINARY_RMWcc(LOCK_PREFIX "subl", v->counter, i, "%0", "e");
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "subl", v->counter, "er", i, "%0", "e");
- }
-
- /**
-@@ -141,7 +141,7 @@ static inline int atomic_inc_and_test(atomic_t *v)
- */
- static inline int atomic_add_negative(int i, atomic_t *v)
- {
-- GEN_BINARY_RMWcc(LOCK_PREFIX "addl", v->counter, i, "%0", "s");
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "addl", v->counter, "er", i, "%0", "s");
- }
-
- /**
-diff --git a/arch/x86/include/asm/atomic64_64.h b/arch/x86/include/asm/atomic64_64.h
-index 3f065c9..46e9052 100644
---- a/arch/x86/include/asm/atomic64_64.h
-+++ b/arch/x86/include/asm/atomic64_64.h
-@@ -72,7 +72,7 @@ static inline void atomic64_sub(long i, atomic64_t *v)
- */
- static inline int atomic64_sub_and_test(long i, atomic64_t *v)
- {
-- GEN_BINARY_RMWcc(LOCK_PREFIX "subq", v->counter, i, "%0", "e");
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "subq", v->counter, "er", i, "%0", "e");
- }
-
- /**
-@@ -138,7 +138,7 @@ static inline int atomic64_inc_and_test(atomic64_t *v)
- */
- static inline int atomic64_add_negative(long i, atomic64_t *v)
- {
-- GEN_BINARY_RMWcc(LOCK_PREFIX "addq", v->counter, i, "%0", "s");
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "addq", v->counter, "er", i, "%0", "s");
- }
-
- /**
-diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h
-index 6d76d09..9fc1af7 100644
---- a/arch/x86/include/asm/bitops.h
-+++ b/arch/x86/include/asm/bitops.h
-@@ -205,7 +205,7 @@ static inline void change_bit(long nr, volatile unsigned long *addr)
- */
- static inline int test_and_set_bit(long nr, volatile unsigned long *addr)
- {
-- GEN_BINARY_RMWcc(LOCK_PREFIX "bts", *addr, nr, "%0", "c");
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "bts", *addr, "Ir", nr, "%0", "c");
- }
-
- /**
-@@ -251,7 +251,7 @@ static inline int __test_and_set_bit(long nr, volatile unsigned long *addr)
- */
- static inline int test_and_clear_bit(long nr, volatile unsigned long *addr)
- {
-- GEN_BINARY_RMWcc(LOCK_PREFIX "btr", *addr, nr, "%0", "c");
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "btr", *addr, "Ir", nr, "%0", "c");
- }
-
- /**
-@@ -304,7 +304,7 @@ static inline int __test_and_change_bit(long nr, volatile unsigned long *addr)
- */
- static inline int test_and_change_bit(long nr, volatile unsigned long *addr)
- {
-- GEN_BINARY_RMWcc(LOCK_PREFIX "btc", *addr, nr, "%0", "c");
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "btc", *addr, "Ir", nr, "%0", "c");
- }
-
- static __always_inline int constant_test_bit(long nr, const volatile unsigned long *addr)
-diff --git a/arch/x86/include/asm/local.h b/arch/x86/include/asm/local.h
-index 5b23e60..4ad6560 100644
---- a/arch/x86/include/asm/local.h
-+++ b/arch/x86/include/asm/local.h
-@@ -52,7 +52,7 @@ static inline void local_sub(long i, local_t *l)
- */
- static inline int local_sub_and_test(long i, local_t *l)
- {
-- GEN_BINARY_RMWcc(_ASM_SUB, l->a.counter, i, "%0", "e");
-+ GEN_BINARY_RMWcc(_ASM_SUB, l->a.counter, "er", i, "%0", "e");
- }
-
- /**
-@@ -92,7 +92,7 @@ static inline int local_inc_and_test(local_t *l)
- */
- static inline int local_add_negative(long i, local_t *l)
- {
-- GEN_BINARY_RMWcc(_ASM_ADD, l->a.counter, i, "%0", "s");
-+ GEN_BINARY_RMWcc(_ASM_ADD, l->a.counter, "er", i, "%0", "s");
- }
-
- /**
-diff --git a/arch/x86/include/asm/rmwcc.h b/arch/x86/include/asm/rmwcc.h
-index 1ff990f..8f7866a 100644
---- a/arch/x86/include/asm/rmwcc.h
-+++ b/arch/x86/include/asm/rmwcc.h
-@@ -16,8 +16,8 @@ cc_label: \
- #define GEN_UNARY_RMWcc(op, var, arg0, cc) \
- __GEN_RMWcc(op " " arg0, var, cc)
-
--#define GEN_BINARY_RMWcc(op, var, val, arg0, cc) \
-- __GEN_RMWcc(op " %1, " arg0, var, cc, "er" (val))
-+#define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \
-+ __GEN_RMWcc(op " %1, " arg0, var, cc, vcon (val))
-
- #else /* !CC_HAVE_ASM_GOTO */
-
-@@ -33,8 +33,8 @@ do { \
- #define GEN_UNARY_RMWcc(op, var, arg0, cc) \
- __GEN_RMWcc(op " " arg0, var, cc)
-
--#define GEN_BINARY_RMWcc(op, var, val, arg0, cc) \
-- __GEN_RMWcc(op " %2, " arg0, var, cc, "er" (val))
-+#define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \
-+ __GEN_RMWcc(op " %2, " arg0, var, cc, vcon (val))
-
- #endif /* CC_HAVE_ASM_GOTO */
-
---
-cgit v0.9.2
-
-From 0c44c2d0f459cd7e275242b72f500137c4fa834d Mon Sep 17 00:00:00 2001
-From: Peter Zijlstra <peterz at infradead.org>
-Date: Wed, 11 Sep 2013 13:19:24 +0000
-Subject: x86: Use asm goto to implement better modify_and_test() functions
-
-Linus suggested using asm goto to get rid of the typical SETcc + TEST
-instruction pair -- which also clobbers an extra register -- for our
-typical modify_and_test() functions.
-
-Because asm goto doesn't allow output fields it has to include an
-unconditinal memory clobber when it changes a memory variable to force
-a reload.
-
-Luckily all atomic ops already imply a compiler barrier to go along
-with their memory barrier semantics.
-
-Suggested-by: Linus Torvalds <torvalds at linux-foundation.org>
-Signed-off-by: Peter Zijlstra <peterz at infradead.org>
-Link: http://lkml.kernel.org/n/tip-0mtn9siwbeo1d33bap1422se@git.kernel.org
-Signed-off-by: Ingo Molnar <mingo at kernel.org>
----
-diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
-index 722aa3b..da31c8b 100644
---- a/arch/x86/include/asm/atomic.h
-+++ b/arch/x86/include/asm/atomic.h
-@@ -6,6 +6,7 @@
- #include <asm/processor.h>
- #include <asm/alternative.h>
- #include <asm/cmpxchg.h>
-+#include <asm/rmwcc.h>
-
- /*
- * Atomic operations that C can't guarantee us. Useful for
-@@ -76,12 +77,7 @@ static inline void atomic_sub(int i, atomic_t *v)
- */
- static inline int atomic_sub_and_test(int i, atomic_t *v)
- {
-- unsigned char c;
--
-- asm volatile(LOCK_PREFIX "subl %2,%0; sete %1"
-- : "+m" (v->counter), "=qm" (c)
-- : "ir" (i) : "memory");
-- return c;
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "subl", v->counter, i, "%0", "e");
- }
-
- /**
-@@ -118,12 +114,7 @@ static inline void atomic_dec(atomic_t *v)
- */
- static inline int atomic_dec_and_test(atomic_t *v)
- {
-- unsigned char c;
--
-- asm volatile(LOCK_PREFIX "decl %0; sete %1"
-- : "+m" (v->counter), "=qm" (c)
-- : : "memory");
-- return c != 0;
-+ GEN_UNARY_RMWcc(LOCK_PREFIX "decl", v->counter, "%0", "e");
- }
-
- /**
-@@ -136,12 +127,7 @@ static inline int atomic_dec_and_test(atomic_t *v)
- */
- static inline int atomic_inc_and_test(atomic_t *v)
- {
-- unsigned char c;
--
-- asm volatile(LOCK_PREFIX "incl %0; sete %1"
-- : "+m" (v->counter), "=qm" (c)
-- : : "memory");
-- return c != 0;
-+ GEN_UNARY_RMWcc(LOCK_PREFIX "incl", v->counter, "%0", "e");
- }
-
- /**
-@@ -155,12 +141,7 @@ static inline int atomic_inc_and_test(atomic_t *v)
- */
- static inline int atomic_add_negative(int i, atomic_t *v)
- {
-- unsigned char c;
--
-- asm volatile(LOCK_PREFIX "addl %2,%0; sets %1"
-- : "+m" (v->counter), "=qm" (c)
-- : "ir" (i) : "memory");
-- return c;
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "addl", v->counter, i, "%0", "s");
- }
-
- /**
-diff --git a/arch/x86/include/asm/atomic64_64.h b/arch/x86/include/asm/atomic64_64.h
-index 0e1cbfc..3f065c9 100644
---- a/arch/x86/include/asm/atomic64_64.h
-+++ b/arch/x86/include/asm/atomic64_64.h
-@@ -72,12 +72,7 @@ static inline void atomic64_sub(long i, atomic64_t *v)
- */
- static inline int atomic64_sub_and_test(long i, atomic64_t *v)
- {
-- unsigned char c;
--
-- asm volatile(LOCK_PREFIX "subq %2,%0; sete %1"
-- : "=m" (v->counter), "=qm" (c)
-- : "er" (i), "m" (v->counter) : "memory");
-- return c;
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "subq", v->counter, i, "%0", "e");
- }
-
- /**
-@@ -116,12 +111,7 @@ static inline void atomic64_dec(atomic64_t *v)
- */
- static inline int atomic64_dec_and_test(atomic64_t *v)
- {
-- unsigned char c;
--
-- asm volatile(LOCK_PREFIX "decq %0; sete %1"
-- : "=m" (v->counter), "=qm" (c)
-- : "m" (v->counter) : "memory");
-- return c != 0;
-+ GEN_UNARY_RMWcc(LOCK_PREFIX "decq", v->counter, "%0", "e");
- }
-
- /**
-@@ -134,12 +124,7 @@ static inline int atomic64_dec_and_test(atomic64_t *v)
- */
- static inline int atomic64_inc_and_test(atomic64_t *v)
- {
-- unsigned char c;
--
-- asm volatile(LOCK_PREFIX "incq %0; sete %1"
-- : "=m" (v->counter), "=qm" (c)
-- : "m" (v->counter) : "memory");
-- return c != 0;
-+ GEN_UNARY_RMWcc(LOCK_PREFIX "incq", v->counter, "%0", "e");
- }
-
- /**
-@@ -153,12 +138,7 @@ static inline int atomic64_inc_and_test(atomic64_t *v)
- */
- static inline int atomic64_add_negative(long i, atomic64_t *v)
- {
-- unsigned char c;
--
-- asm volatile(LOCK_PREFIX "addq %2,%0; sets %1"
-- : "=m" (v->counter), "=qm" (c)
-- : "er" (i), "m" (v->counter) : "memory");
-- return c;
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "addq", v->counter, i, "%0", "s");
- }
-
- /**
-diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h
-index 41639ce..6d76d09 100644
---- a/arch/x86/include/asm/bitops.h
-+++ b/arch/x86/include/asm/bitops.h
-@@ -14,6 +14,7 @@
-
- #include <linux/compiler.h>
- #include <asm/alternative.h>
-+#include <asm/rmwcc.h>
-
- #if BITS_PER_LONG == 32
- # define _BITOPS_LONG_SHIFT 5
-@@ -204,12 +205,7 @@ static inline void change_bit(long nr, volatile unsigned long *addr)
- */
- static inline int test_and_set_bit(long nr, volatile unsigned long *addr)
- {
-- int oldbit;
--
-- asm volatile(LOCK_PREFIX "bts %2,%1\n\t"
-- "sbb %0,%0" : "=r" (oldbit), ADDR : "Ir" (nr) : "memory");
--
-- return oldbit;
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "bts", *addr, nr, "%0", "c");
- }
-
- /**
-@@ -255,13 +251,7 @@ static inline int __test_and_set_bit(long nr, volatile unsigned long *addr)
- */
- static inline int test_and_clear_bit(long nr, volatile unsigned long *addr)
- {
-- int oldbit;
--
-- asm volatile(LOCK_PREFIX "btr %2,%1\n\t"
-- "sbb %0,%0"
-- : "=r" (oldbit), ADDR : "Ir" (nr) : "memory");
--
-- return oldbit;
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "btr", *addr, nr, "%0", "c");
- }
-
- /**
-@@ -314,13 +304,7 @@ static inline int __test_and_change_bit(long nr, volatile unsigned long *addr)
- */
- static inline int test_and_change_bit(long nr, volatile unsigned long *addr)
- {
-- int oldbit;
--
-- asm volatile(LOCK_PREFIX "btc %2,%1\n\t"
-- "sbb %0,%0"
-- : "=r" (oldbit), ADDR : "Ir" (nr) : "memory");
--
-- return oldbit;
-+ GEN_BINARY_RMWcc(LOCK_PREFIX "btc", *addr, nr, "%0", "c");
- }
-
- static __always_inline int constant_test_bit(long nr, const volatile unsigned long *addr)
-diff --git a/arch/x86/include/asm/local.h b/arch/x86/include/asm/local.h
-index 2d89e39..5b23e60 100644
---- a/arch/x86/include/asm/local.h
-+++ b/arch/x86/include/asm/local.h
-@@ -52,12 +52,7 @@ static inline void local_sub(long i, local_t *l)
- */
- static inline int local_sub_and_test(long i, local_t *l)
- {
-- unsigned char c;
--
-- asm volatile(_ASM_SUB "%2,%0; sete %1"
-- : "+m" (l->a.counter), "=qm" (c)
-- : "ir" (i) : "memory");
-- return c;
-+ GEN_BINARY_RMWcc(_ASM_SUB, l->a.counter, i, "%0", "e");
- }
-
- /**
-@@ -70,12 +65,7 @@ static inline int local_sub_and_test(long i, local_t *l)
- */
- static inline int local_dec_and_test(local_t *l)
- {
-- unsigned char c;
--
-- asm volatile(_ASM_DEC "%0; sete %1"
-- : "+m" (l->a.counter), "=qm" (c)
-- : : "memory");
-- return c != 0;
-+ GEN_UNARY_RMWcc(_ASM_DEC, l->a.counter, "%0", "e");
- }
-
- /**
-@@ -88,12 +78,7 @@ static inline int local_dec_and_test(local_t *l)
- */
- static inline int local_inc_and_test(local_t *l)
- {
-- unsigned char c;
--
-- asm volatile(_ASM_INC "%0; sete %1"
-- : "+m" (l->a.counter), "=qm" (c)
-- : : "memory");
-- return c != 0;
-+ GEN_UNARY_RMWcc(_ASM_INC, l->a.counter, "%0", "e");
- }
-
- /**
-@@ -107,12 +92,7 @@ static inline int local_inc_and_test(local_t *l)
- */
- static inline int local_add_negative(long i, local_t *l)
- {
-- unsigned char c;
--
-- asm volatile(_ASM_ADD "%2,%0; sets %1"
-- : "+m" (l->a.counter), "=qm" (c)
-- : "ir" (i) : "memory");
-- return c;
-+ GEN_BINARY_RMWcc(_ASM_ADD, l->a.counter, i, "%0", "s");
- }
-
- /**
-cgit v0.9.2
Modified: PKGBUILD
===================================================================
--- PKGBUILD 2014-02-13 18:15:29 UTC (rev 205906)
+++ PKGBUILD 2014-02-13 19:58:32 UTC (rev 205907)
@@ -6,7 +6,7 @@
#pkgbase=linux-custom # Build kernel with a different name
_srcname=linux-3.13
pkgver=3.13.2
-pkgrel=2
+pkgrel=3
arch=('i686' 'x86_64')
url="http://www.kernel.org/"
license=('GPL2')
@@ -27,7 +27,7 @@
'0005-sunrpc-add-an-info-file-for-the-dummy-gssd-pipe.patch'
'0006-rpc_pipe-fix-cleanup-of-dummy-gssd-directory-when-no.patch'
'0001-syscalls.h-use-gcc-alias-instead-of-assembler-aliase.patch'
- '0001-revert-avmfritz-breaker.patch'
+ '0001-quirk-asm_volatile_goto.patch'
'i8042-fix-aliases.patch'
)
md5sums=('0ecbaf65c00374eb4a826c2f9f37606f'
@@ -44,7 +44,7 @@
'd5907a721b97299f0685c583499f7820'
'a724515b350b29c53f20e631c6cf9a14'
'e6fa278c092ad83780e2dd0568e24ca6'
- 'bc1917dd2a0f9e4f511f120c85fa0c49'
+ '6baa312bc166681f48e972824f3f6649'
'93dbf73af819b77f03453a9c6de2bb47')
_kernelname=${pkgbase#linux}
@@ -87,10 +87,9 @@
# Fix i8042 aliases
patch -p1 -i "${srcdir}/i8042-fix-aliases.patch"
- # Revert avmfritz breaker
- # https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=e0f6dec35f9286e78879fe1ac92803fd69fc4fdc
- # https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=0c44c2d0f459cd7e275242b72f500137c4fa834d
- patch -Rp1 -i "${srcdir}/0001-revert-avmfritz-breaker.patch"
+ # Fix compile issues
+ # http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/patch/?id=a9f180345f5378ac87d80ed0bea55ba421d83859
+ patch -Np1 -i "${srcdir}/0001-quirk-asm_volatile_goto.patch"
if [ "${CARCH}" = "x86_64" ]; then
cat "${srcdir}/config.x86_64" > ./.config
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