From: Matthew Wilcox <willy@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>,
Waiman Long <longman@redhat.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Richard Henderson <rth@twiddle.net>
Subject: [PATCH 2/2] x86: Enable named address spaces for percpu data
Date: Wed, 12 Sep 2018 07:44:42 -0700 [thread overview]
Message-ID: <20180912144442.29271-3-willy@infradead.org> (raw)
In-Reply-To: <20180912144442.29271-1-willy@infradead.org>
From: Richard Henderson <rth@twiddle.net>
For ease of disabling this feature, split the actual enabling into its
own patch.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Matthew Wilcox <willy@infradead.org>
---
arch/x86/include/asm/percpu.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 30a08d0d95ee..f3c5eebcbc86 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -5,9 +5,15 @@
#ifdef CONFIG_X86_64
#define __percpu_seg gs
#define __percpu_mov_op movq
+# ifdef __SEG_GS
+# define __percpu_addrspace __seg_gs
+# endif
#else
#define __percpu_seg fs
#define __percpu_mov_op movl
+# ifdef __SEG_FS
+# define __percpu_addrspace __seg_fs
+# endif
#endif
#ifdef __ASSEMBLY__
--
2.18.0
next prev parent reply other threads:[~2018-09-12 14:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-12 14:44 [PATCH 0/2] Use named address spaces for percpu data Matthew Wilcox
2018-09-12 14:44 ` [PATCH 1/2] x86: Use named address spaces in asm/percpu.h Matthew Wilcox
2018-09-12 14:44 ` Matthew Wilcox [this message]
2018-09-12 15:08 ` [PATCH 0/2] Use named address spaces for percpu data Richard Henderson
2018-09-12 21:06 ` Ingo Molnar
2018-09-12 21:08 ` Ingo Molnar
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