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| author |   Ingo Molnar <mingo@kernel.org> | 2019-06-17 12:12:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-06-17 12:12:27 +0200 |
| commit | 23da766ab1dc005860b675bf048226a11a748bf9 (patch) | |
| tree | 3f8dbfc2cf68f5da3faa3a377087b06dd8ad343d /include/linux/sched | |
| parent | sched/fair: Remove sgs->sum_weighted_load (diff) | |
| parent | Linux 5.2-rc5 (diff) | |
| download | linux-dev-23da766ab1dc005860b675bf048226a11a748bf9.tar.xz linux-dev-23da766ab1dc005860b675bf048226a11a748bf9.zip | |
Merge tag 'v5.2-rc5' into sched/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/mm.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index a3fda9f024c3..4a7944078cc3 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -54,6 +54,10 @@ static inline void mmdrop(struct mm_struct *mm) * followed by taking the mmap_sem 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_sem * for reading and outside the context of the process, so it is also |