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authorJann Horn <jannh@google.com>2020-10-15 20:13:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-16 11:11:22 -0700
commit4d45e75a9955ade5c2f49bd96fc4173b2cec9a72 (patch)
tree71b16b0e22ee630e2956a3285990fb49df84685e /drivers/infiniband
parent7f3bfab52cab96c510fd60dd757a32db7bc52d3c (diff)
downloadlinux-4d45e75a9955ade5c2f49bd96fc4173b2cec9a72.tar.bz2
mm: remove the now-unnecessary mmget_still_valid() hack
The preceding patches have ensured that core dumping properly takes the mmap_lock. Thanks to that, we can now remove mmget_still_valid() and all its users. Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: "Eric W . Biederman" <ebiederm@xmission.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Hugh Dickins <hughd@google.com> Link: http://lkml.kernel.org/r/20200827114932.3572699-8-jannh@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/core/uverbs_main.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 37794d88b1f3..a4ba0b87d6de 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -845,8 +845,6 @@ void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile)
* will only be one mm, so no big deal.
*/
mmap_read_lock(mm);
- if (!mmget_still_valid(mm))
- goto skip_mm;
mutex_lock(&ufile->umap_lock);
list_for_each_entry_safe (priv, next_priv, &ufile->umaps,
list) {
@@ -865,7 +863,6 @@ void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile)
}
}
mutex_unlock(&ufile->umap_lock);
- skip_mm:
mmap_read_unlock(mm);
mmput(mm);
}