linux-kernel - [tip: x86/percpu] x86/percpu: Avoid sparse warning with cast to named address space

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Date:   Mon, 11 Dec 2023 12:06:17 -0000
From:   "tip-bot2 for Uros Bizjak" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     kernel test robot <lkp@...el.com>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Uros Bizjak <ubizjak@...il.com>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/percpu] x86/percpu: Avoid sparse warning with cast to named
 address space

The following commit has been merged into the x86/percpu branch of tip:

Commit-ID:     3a1d3829e193c091475ceab481c5f8deab385023
Gitweb:        https://git.kernel.org/tip/3a1d3829e193c091475ceab481c5f8deab385023
Author:        Uros Bizjak <ubizjak@...il.com>
AuthorDate:    Mon, 04 Dec 2023 22:02:31 +01:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Mon, 11 Dec 2023 11:47:15 +01:00

x86/percpu: Avoid sparse warning with cast to named address space

Teach sparse about __seg_fs and __seg_gs named address space
qualifiers to to avoid warnings about unexpected keyword at
the end of cast operator.

Reported-by: kernel test robot <lkp@...el.com>
Acked-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/20231204210320.114429-3-ubizjak@gmail.com
Closes: https://lore.kernel.org/oe-kbuild-all/202310080853.UhMe5iWa-lkp@intel.com/
---
 arch/x86/include/asm/percpu.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 3859aba..e56a378 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -36,6 +36,11 @@
 
 #ifdef CONFIG_CC_HAS_NAMED_AS
 
+#ifdef __CHECKER__
+#define __seg_gs		__attribute__((address_space(__seg_gs)))
+#define __seg_fs		__attribute__((address_space(__seg_fs)))
+#endif
+
 #ifdef CONFIG_X86_64
 #define __percpu_seg_override	__seg_gs
 #else