sched: add macros to define bitops for task atomic flags
commit e0e5070b20e01f0321f97db4e4e174f3f6b49e50 upstream. This will simplify code when we add new flags. v3: - Kees pointed out that no_new_privs should never be cleared, so we shouldn't define task_clear_no_new_privs(). we define 3 macros instead of a single one. v2: - updated scripts/tags.sh, suggested by Peter Change-Id: Ic1b54bc755c8b460b8362869136f058fcf3a1819 Cc: Ingo Molnar <mingo@kernel.org> Cc: Miao Xie <miaox@cn.fujitsu.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Zefan Li <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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@ -1922,15 +1922,18 @@ static inline void memalloc_noio_restore(unsigned int flags)
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/* Per-process atomic flags. */
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#define PFA_NO_NEW_PRIVS 0 /* May not gain new privileges. */
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static inline bool task_no_new_privs(struct task_struct *p)
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{
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return test_bit(PFA_NO_NEW_PRIVS, &p->atomic_flags);
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}
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#define TASK_PFA_TEST(name, func) \
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static inline bool task_##func(struct task_struct *p) \
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{ return test_bit(PFA_##name, &p->atomic_flags); }
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#define TASK_PFA_SET(name, func) \
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static inline void task_set_##func(struct task_struct *p) \
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{ set_bit(PFA_##name, &p->atomic_flags); }
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#define TASK_PFA_CLEAR(name, func) \
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static inline void task_clear_##func(struct task_struct *p) \
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{ clear_bit(PFA_##name, &p->atomic_flags); }
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static inline void task_set_no_new_privs(struct task_struct *p)
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{
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set_bit(PFA_NO_NEW_PRIVS, &p->atomic_flags);
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}
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TASK_PFA_TEST(NO_NEW_PRIVS, no_new_privs)
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TASK_PFA_SET(NO_NEW_PRIVS, no_new_privs)
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/*
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* task->jobctl flags
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