diff options
Diffstat (limited to 'include/linux/sched/mm.h')
-rw-r--r-- | include/linux/sched/mm.h | 28 |
1 files changed, 3 insertions, 25 deletions
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index f889e332912f..981e34cb1409 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -49,31 +49,6 @@ static inline void mmdrop(struct mm_struct *mm) __mmdrop(mm); } -/* - * This has to be called after a get_task_mm()/mmget_not_zero() - * followed by taking the mmap_lock for writing before modifying the - * vmas or anything the coredump pretends not to change from under it. - * - * It also has to be called when mmgrab() is used in the context of - * the process, but then the mm_count refcount is transferred outside - * the context of the process to run down_write() on that pinned mm. - * - * NOTE: find_extend_vma() called from GUP context is the only place - * that can modify the "mm" (notably the vm_start/end) under mmap_lock - * for reading and outside the context of the process, so it is also - * the only case that holds the mmap_lock for reading that must call - * this function. Generally if the mmap_lock is hold for reading - * there's no need of this check after get_task_mm()/mmget_not_zero(). - * - * This function can be obsoleted and the check can be removed, after - * the coredump code will hold the mmap_lock for writing before - * invoking the ->core_dump methods. - */ -static inline bool mmget_still_valid(struct mm_struct *mm) -{ - return likely(!mm->core_state); -} - /** * mmget() - Pin the address space associated with a &struct mm_struct. * @mm: The address space to pin. @@ -348,10 +323,13 @@ enum { MEMBARRIER_STATE_GLOBAL_EXPEDITED = (1U << 3), MEMBARRIER_STATE_PRIVATE_EXPEDITED_SYNC_CORE_READY = (1U << 4), MEMBARRIER_STATE_PRIVATE_EXPEDITED_SYNC_CORE = (1U << 5), + MEMBARRIER_STATE_PRIVATE_EXPEDITED_RSEQ_READY = (1U << 6), + MEMBARRIER_STATE_PRIVATE_EXPEDITED_RSEQ = (1U << 7), }; enum { MEMBARRIER_FLAG_SYNC_CORE = (1U << 0), + MEMBARRIER_FLAG_RSEQ = (1U << 1), }; #ifdef CONFIG_ARCH_HAS_MEMBARRIER_CALLBACKS |