From: anton.ivanov@cambridgegreys.com
To: linux-um@lists.infradead.org
Cc: richard@nod.at, Anton Ivanov <anton.ivanov@cambridgegreys.com>
Subject: [PATCH v4 7/7] um: borrow bitops from the x86 tree
Date: Fri, 11 Dec 2020 17:45:59 +0000 [thread overview]
Message-ID: <20201211174559.26010-8-anton.ivanov@cambridgegreys.com> (raw)
In-Reply-To: <20201211174559.26010-1-anton.ivanov@cambridgegreys.com>
From: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Using x86 bitops instead of the asm-generic allows to squeeze
a couple of percents improvement on fs IO in UML. It should
improve other areas as well.
Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
---
arch/um/include/asm/bitops-x86.h | 1 +
arch/um/include/asm/bitops.h | 7 +++++++
2 files changed, 8 insertions(+)
create mode 120000 arch/um/include/asm/bitops-x86.h
create mode 100644 arch/um/include/asm/bitops.h
diff --git a/arch/um/include/asm/bitops-x86.h b/arch/um/include/asm/bitops-x86.h
new file mode 120000
index 000000000000..15a96ff554b2
--- /dev/null
+++ b/arch/um/include/asm/bitops-x86.h
@@ -0,0 +1 @@
+../../../x86/include/asm/bitops.h
\ No newline at end of file
diff --git a/arch/um/include/asm/bitops.h b/arch/um/include/asm/bitops.h
new file mode 100644
index 000000000000..a0cd978c6aaa
--- /dev/null
+++ b/arch/um/include/asm/bitops.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_UM_BITOPS_H
+#define _ASM_UM_BITOPS_H
+
+#include <asm/bitops-x86.h>
+
+#endif
--
2.20.1
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prev parent reply other threads:[~2020-12-11 17:46 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-11 17:45 Amended and retested for 32 bit "borrow ops" series anton.ivanov
2020-12-11 17:45 ` [PATCH v4 1/7] um: allow the use of glibc functions instead of builtins anton.ivanov
2020-12-11 20:03 ` Johannes Berg
2020-12-11 17:45 ` [PATCH v4 2/7] um: enable the use of optimized xor routines in UML anton.ivanov
2020-12-11 20:07 ` Johannes Berg
2020-12-11 21:57 ` Anton Ivanov
2020-12-11 22:00 ` Johannes Berg
2020-12-11 22:40 ` Anton Ivanov
2020-12-14 9:07 ` Anton Ivanov
2020-12-14 9:12 ` Johannes Berg
2020-12-14 9:36 ` Anton Ivanov
2020-12-11 17:45 ` [PATCH v4 3/7] um: "borrow" atomics from x86 architecture anton.ivanov
2020-12-11 20:08 ` Johannes Berg
2020-12-11 21:31 ` Anton Ivanov
2020-12-11 17:45 ` [PATCH v4 4/7] um: add a UML specific futex implementation anton.ivanov
2020-12-11 20:10 ` Johannes Berg
2020-12-11 17:45 ` [PATCH v4 5/7] um: "borrow" cmpxchg from x86 tree in UML anton.ivanov
2020-12-11 17:45 ` [PATCH v4 6/7] um: swithch futex ops to cmpxchg anton.ivanov
2020-12-11 20:12 ` Johannes Berg
2020-12-11 21:33 ` Anton Ivanov
2020-12-11 17:45 ` anton.ivanov [this message]
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