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| author | Yury Norov <ynorov@caviumnetworks.com> | 2017-08-20 13:20:47 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2017-08-22 18:13:04 +0100 |
| commit | 5ce93ab624cee4ed68086c946bd6d18b9b3f64aa (patch) | |
| tree | 189c30a3a1e8ea8483aa8cc22a478ad0a6093e05 /arch/arm64/include/asm/mmu.h | |
| parent | 828f193dd62a40ade5ea8b24cb8b0a22c30df673 (diff) | |
| download | linux-5ce93ab624cee4ed68086c946bd6d18b9b3f64aa.tar.bz2 | |
arm64: introduce separated bits for mm_context_t flags
Currently mm->context.flags field uses thread_info flags which is not
the best idea for many reasons. For example, mm_context_t doesn't need
most of thread_info flags. And it would be difficult to add new mm-related
flag if needed because it may easily interfere with TIF ones.
To deal with it, the new MMCF_AARCH32 flag is introduced for
mm_context_t->flags, where MMCF prefix stands for mm_context_t flags.
Also, mm_context_t flag doesn't require atomicity and ordering of the
access, so using set/clear_bit() is replaced with simple masks.
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/mmu.h')
| -rw-r--r-- | arch/arm64/include/asm/mmu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index 5468c834b072..0d34bf0a89c7 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -16,6 +16,8 @@ #ifndef __ASM_MMU_H #define __ASM_MMU_H +#define MMCF_AARCH32 0x1 /* mm context flag for AArch32 executables */ + typedef struct { atomic64_t id; void *vdso; |