| Message ID | 20191211184027.20130-2-catalin.marinas@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: Memory Tagging Extension user-space support | expand |
On Wed, Dec 11, 2019 at 7:40 PM Catalin Marinas <catalin.marinas@arm.com> wrote: > > From: Dave Martin <Dave.Martin@arm.com> > > The asm-generic/mman.h definitions are used by a few architectures that > also define arch-specific PROT flags with value 0x10 and 0x20. This > currently applies to sparc and powerpc for 0x10, while arm64 will soon > join with 0x10 and 0x20. > > To help future maintainers, document the use of this flag in the > asm-generic header too. > > Cc: Arnd Bergmann <arnd@arndb.de> > Signed-off-by: Dave Martin <Dave.Martin@arm.com> > [catalin.marinas@arm.com: reserve 0x20 as well] > Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h index c160a5354eb6..f94f65d429be 100644 --- a/include/uapi/asm-generic/mman-common.h +++ b/include/uapi/asm-generic/mman-common.h @@ -11,6 +11,8 @@ #define PROT_WRITE 0x2 /* page can be written */ #define PROT_EXEC 0x4 /* page can be executed */ #define PROT_SEM 0x8 /* page may be used for atomic ops */ +/* 0x10 reserved for arch-specific use */ +/* 0x20 reserved for arch-specific use */ #define PROT_NONE 0x0 /* page can not be accessed */ #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */