diff options
| author | Will Deacon <will.deacon@arm.com> | 2019-02-22 17:45:42 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2019-04-08 14:00:35 +0300 |
| commit | 420af1554790a95e6813f56f63b6d2361614082b (patch) | |
| tree | 67072735af8f8cad386cdf2396fe4c13c27a4459 /arch/powerpc/include/asm/mmiowb.h | |
| parent | 49ca6462fc9e0f5a67cd96eeddd844efc3fb33b9 (diff) | |
| download | linux-420af1554790a95e6813f56f63b6d2361614082b.tar.xz | |
powerpc/mmiowb: Hook up mmwiob() implementation to asm-generic code
In a bid to kill off explicit mmiowb() usage in driver code, hook up
the asm-generic mmiowb() tracking code but provide a definition of
arch_mmiowb_state() so that the tracking data can remain in the paca
as it does at present
This replaces the existing (flawed) implementation.
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/powerpc/include/asm/mmiowb.h')
| -rw-r--r-- | arch/powerpc/include/asm/mmiowb.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmiowb.h b/arch/powerpc/include/asm/mmiowb.h new file mode 100644 index 000000000000..b10180613507 --- /dev/null +++ b/arch/powerpc/include/asm/mmiowb.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_MMIOWB_H +#define _ASM_POWERPC_MMIOWB_H + +#ifdef CONFIG_MMIOWB + +#include <linux/compiler.h> +#include <asm/barrier.h> +#include <asm/paca.h> + +#define arch_mmiowb_state() (&local_paca->mmiowb_state) +#define mmiowb() mb() + +#else +#define mmiowb() do { } while (0) +#endif /* CONFIG_MMIOWB */ + +#include <asm-generic/mmiowb.h> + +#endif /* _ASM_POWERPC_MMIOWB_H */ |