Displaying 9 results from an estimated 9 matches for "__asm_rwonce_h".
2020 Jun 30
0
[PATCH 18/18] arm64: lto: Strengthen READ_ONCE() to acquire when CLANG_LTO=y
...e.h
diff --git a/arch/arm64/include/asm/rwonce.h b/arch/arm64/include/asm/rwonce.h
new file mode 100644
index 000000000000..515e360b01a1
--- /dev/null
+++ b/arch/arm64/include/asm/rwonce.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Google LLC.
+ */
+#ifndef __ASM_RWONCE_H
+#define __ASM_RWONCE_H
+
+#ifdef CONFIG_CLANG_LTO
+
+#include <linux/compiler_types.h>
+#include <asm/alternative-macros.h>
+
+#ifndef BUILD_VDSO
+
+#ifdef CONFIG_AS_HAS_LDAPR
+#define __LOAD_RCPC(sfx, regs...) \
+ ALTERNATIVE( \
+ "ldar" #sfx "\t" #regs,...
2020 Jul 10
0
[PATCH v3 19/19] arm64: lto: Strengthen READ_ONCE() to acquire when CONFIG_LTO=y
...e.h
diff --git a/arch/arm64/include/asm/rwonce.h b/arch/arm64/include/asm/rwonce.h
new file mode 100644
index 000000000000..d78eb4cb795b
--- /dev/null
+++ b/arch/arm64/include/asm/rwonce.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Google LLC.
+ */
+#ifndef __ASM_RWONCE_H
+#define __ASM_RWONCE_H
+
+#ifdef CONFIG_LTO
+
+#include <linux/compiler_types.h>
+#include <asm/alternative-macros.h>
+
+#ifndef BUILD_VDSO
+
+#ifdef CONFIG_AS_HAS_LDAPR
+#define __LOAD_RCPC(sfx, regs...) \
+ ALTERNATIVE( \
+ "ldar" #sfx "\t" #regs, \...
2020 Jun 30
0
[PATCH 04/18] alpha: Override READ_ONCE() with barriered implementation
...uot;
diff --git a/arch/alpha/include/asm/rwonce.h b/arch/alpha/include/asm/rwonce.h
new file mode 100644
index 000000000000..83a92e49a615
--- /dev/null
+++ b/arch/alpha/include/asm/rwonce.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 Google LLC.
+ */
+#ifndef __ASM_RWONCE_H
+#define __ASM_RWONCE_H
+
+#include <asm/barrier.h>
+
+/*
+ * Alpha is apparently daft enough to reorder address-dependent loads
+ * on some CPU implementations. Knock some common sense into it with
+ * a memory barrier in READ_ONCE().
+ */
+#define __READ_ONCE(x) __smp_load_acquire(&(x))...
2020 Jul 06
0
[PATCH 18/18] arm64: lto: Strengthen READ_ONCE() to acquire when CLANG_LTO=y
...le mode 100644
> > index 000000000000..515e360b01a1
> > --- /dev/null
> > +++ b/arch/arm64/include/asm/rwonce.h
> > @@ -0,0 +1,63 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2020 Google LLC.
> > + */
> > +#ifndef __ASM_RWONCE_H
> > +#define __ASM_RWONCE_H
> > +
> > +#ifdef CONFIG_CLANG_LTO
> > +
> > +#include <linux/compiler_types.h>
> > +#include <asm/alternative-macros.h>
> > +
> > +#ifndef BUILD_VDSO
> > +
> > +#ifdef CONFIG_AS_HAS_LDAPR
> >...
2020 Jul 02
0
[PATCH 18/18] arm64: lto: Strengthen READ_ONCE() to acquire when CLANG_LTO=y
...le mode 100644
> > index 000000000000..515e360b01a1
> > --- /dev/null
> > +++ b/arch/arm64/include/asm/rwonce.h
> > @@ -0,0 +1,63 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2020 Google LLC.
> > + */
> > +#ifndef __ASM_RWONCE_H
> > +#define __ASM_RWONCE_H
> > +
> > +#ifdef CONFIG_CLANG_LTO
>
> Don't we have a generic option for LTO that's not specific to Clang.
/me looks at the LTO series some more
Oh yeah, there's CONFIG_LTO which is selected by CONFIG_LTO_CLANG, which is
the non-ty...
2020 Jun 30
32
[PATCH 00/18] Allow architectures to override __READ_ONCE()
Hi everyone,
This is the long-awaited version two of the patches I previously
posted in November last year:
https://lore.kernel.org/lkml/20191108170120.22331-1-will at kernel.org/
I ended up parking the series while the READ_ONCE() implementation was
being overhauled, but with that merged during the recent merge window
and LTO patches being posted again [1], it was time for a refresh.
The
2020 Jun 30
32
[PATCH 00/18] Allow architectures to override __READ_ONCE()
Hi everyone,
This is the long-awaited version two of the patches I previously
posted in November last year:
https://lore.kernel.org/lkml/20191108170120.22331-1-will at kernel.org/
I ended up parking the series while the READ_ONCE() implementation was
being overhauled, but with that merged during the recent merge window
and LTO patches being posted again [1], it was time for a refresh.
The
2020 Jul 10
24
[PATCH 00/18] Allow architectures to override __READ_ONCE()
Hi all,
This is version three of the patches I previously posted here:
v1: https://lore.kernel.org/lkml/20191108170120.22331-1-will at kernel.org/
v2: https://lore.kernel.org/r/20200630173734.14057-1-will at kernel.org
Changes since v2 include:
* Actually add the barrier in READ_ONCE() for Alpha!
* Implement Alpha's smp_load_acquire() using __READ_ONCE(), rather than
the other
2019 Nov 08
15
[PATCH 00/13] Finish off [smp_]read_barrier_depends()
Hi all,
Although [smp_]read_barrier_depends() became part of READ_ONCE() in
commit 76ebbe78f739 ("locking/barriers: Add implicit
smp_read_barrier_depends() to READ_ONCE()"), it still limps on in the
Linux memory model with the sinister hope of attracting innocent new
users so that it becomes impossible to remove altogether.
Let's strike before it's too late: there's only