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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/kernel/probes | |
| 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/kernel/probes')
| -rw-r--r-- | arch/arm64/kernel/probes/uprobes.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/probes/uprobes.c b/arch/arm64/kernel/probes/uprobes.c index 26c998534dca..636ca0119c0e 100644 --- a/arch/arm64/kernel/probes/uprobes.c +++ b/arch/arm64/kernel/probes/uprobes.c @@ -40,7 +40,7 @@ int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe, struct mm_struct *mm, probe_opcode_t insn; /* TODO: Currently we do not support AARCH32 instruction probing */ - if (test_bit(TIF_32BIT, &mm->context.flags)) + if (mm->context.flags & MMCF_AARCH32) return -ENOTSUPP; else if (!IS_ALIGNED(addr, AARCH64_INSN_SIZE)) return -EINVAL; |