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authorYury Norov <ynorov@caviumnetworks.com>2017-08-20 13:20:47 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2017-08-22 18:13:04 +0100
commit5ce93ab624cee4ed68086c946bd6d18b9b3f64aa (patch)
tree189c30a3a1e8ea8483aa8cc22a478ad0a6093e05 /arch/arm64/include/asm/mmu.h
parentarm64: hugetlb: Cleanup setup_hugepagesz (diff)
downloadlinux-dev-5ce93ab624cee4ed68086c946bd6d18b9b3f64aa.tar.xz
linux-dev-5ce93ab624cee4ed68086c946bd6d18b9b3f64aa.zip
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 '')
-rw-r--r--arch/arm64/include/asm/mmu.h2
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;