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Peter Anvin" , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , Josh Poimboeuf Subject: [PATCH] x86/percpu: Enable named address spaces for all capable GCC versions Date: Mon, 20 May 2024 10:21:14 +0200 Message-ID: <20240520082134.121320-1-ubizjak@gmail.com> X-Mailer: git-send-email 2.45.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Enable named address spaces also for GCC 6, GCC 7 and GCC 8 releases. These compilers all produce kernel images that boot without problems. Use compile-time test to detect compiler support for named address spaces. The test passes with GCC 6 as the earliest compiler version where the support for named address spaces was introduced. Signed-off-by: Uros Bizjak Cc: Ingo Molnar Cc: Andy Lutomirski Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Josh Poimboeuf --- arch/x86/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 9d16fee6bdb8..c9e0a54f469e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2430,7 +2430,8 @@ source "kernel/livepatch/Kconfig" endmenu =20 config CC_HAS_NAMED_AS - def_bool CC_IS_GCC && GCC_VERSION >=3D 90100 + def_bool $(success,echo 'int __seg_fs fs; int __seg_gs gs;' | $(CC) -x c = - -S -o /dev/null) + depends on CC_IS_GCC =20 config CC_HAS_NAMED_AS_FIXED_SANITIZERS def_bool CC_IS_GCC && GCC_VERSION >=3D 130300 --=20 2.45.1