Merge tag ‘for-linus-20190428’ of git:// [Linux 5.1]

Merge tag ‘for-linus-20190428’ of git:// [Linux 5.1]

This Linux kernel change "Merge tag ‘for-linus-20190428’ of git://" is included in the Linux 5.1 release. This change is authored by Linus Torvalds <torvalds [at]> on Sun Apr 28 10:06:32 2019 -0700. The commit for this change in Linux stable tree is 975a0f4 (patch). Other info about this change: Merge: 14f974d 8358e3a

Merge tag 'for-linus-20190428' of git://

Pull block fixes from Jens Axboe:
 "A set of io_uring fixes that should go into this release. In
  particular, this contains:

   - The mutex lock vs ctx ref count fix (me)

   - Removal of a dead variable (me)

   - Two race fixes (Stefan)

   - Ring head/tail condition fix for poll full SQ detection (Stefan)"

* tag 'for-linus-20190428' of git://
  io_uring: remove 'state' argument from io_{read,write} path
  io_uring: fix poll full SQ detection
  io_uring: fix race condition when sq threads goes sleeping
  io_uring: fix race condition reading SQ entries
  io_uring: fail io_uring_register(2) on a dying io_uring instance

There is no are 0 lines of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.

 drivers/net/slip/slhc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/slip/slhc.c b/drivers/net/slip/slhc.c
index f4e93f5..ea90db3 100644
--- a/drivers/net/slip/slhc.c
+++ b/drivers/net/slip/slhc.c
@@ -153,7 +153,7 @@ struct slcompress *
 slhc_free(struct slcompress *comp)
-   if ( comp == NULLSLCOMPR )
+   if ( IS_ERR_OR_NULL(comp) )

    if ( comp->tstate != NULLSLSTATE )

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