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| author |   Michael Ellerman <mpe@ellerman.id.au> | 2017-07-06 15:35:52 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 16:24:30 -0700 |
| commit | 938f846492d6682584cbe4f3f19c4ebffec46311 (patch) | |
| tree | 97790d3b02cbac5aa520cc318b3adfaa6e8f261c /include/linux/set_memory.h | |
| parent | scripts/spelling.txt: add a bunch more spelling mistakes (diff) | |
| download | linux-dev-938f846492d6682584cbe4f3f19c4ebffec46311.tar.xz linux-dev-938f846492d6682584cbe4f3f19c4ebffec46311.zip | |
provide linux/set_memory.h
Currently code that wants to use set_memory_ro() etc, needs to include
asm/set_memory.h, which doesn't exist on all arches. Some code knows it
only builds on arches which have the header, other code guards the
inclusion with an #ifdef, neither is ideal.
So create linux/set_memory.h. This always exists, so users don't need
an #ifdef just to include the header.
When CONFIG_ARCH_HAS_SET_MEMORY=y it includes asm/set_memory.h,
otherwise it provides empty non-failing implementations.
Link: http://lkml.kernel.org/r/1498717781-29151-1-git-send-email-mpe@ellerman.id.au
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/set_memory.h')
| -rw-r--r-- | include/linux/set_memory.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h new file mode 100644 index 000000000000..e5140648f638 --- /dev/null +++ b/include/linux/set_memory.h @@ -0,0 +1,20 @@ +/* + * Copyright 2017, Michael Ellerman, IBM Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 as published by the Free Software Foundation; + */ +#ifndef _LINUX_SET_MEMORY_H_ +#define _LINUX_SET_MEMORY_H_ + +#ifdef CONFIG_ARCH_HAS_SET_MEMORY +#include <asm/set_memory.h> +#else +static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; } +static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; } +static inline int set_memory_x(unsigned long addr, int numpages) { return 0; } +static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } +#endif + +#endif /* _LINUX_SET_MEMORY_H_ */ |