Author: hselasky
Date: Fri May  1 10:28:21 2020
New Revision: 360531
URL: https://svnweb.freebsd.org/changeset/base/360531

Log:
  Implement mutex_lock_killable() in the LinuxKPI.
  
  Submitted by: ashafer_badland.io (Austin Shafer)
  MFC after:    1 week
  Sponsored by: Mellanox Technologies

Modified:
  head/sys/compat/linuxkpi/common/include/linux/mutex.h

Modified: head/sys/compat/linuxkpi/common/include/linux/mutex.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/linux/mutex.h       Fri May  1 
10:25:07 2020        (r360530)
+++ head/sys/compat/linuxkpi/common/include/linux/mutex.h       Fri May  1 
10:28:21 2020        (r360531)
@@ -66,6 +66,18 @@ typedef struct mutex {
        linux_mutex_lock_interruptible(_m);     \
 })
 
+/*
+ * Reuse the interruptable method since the SX
+ * lock handles both signals and interrupts:
+ */
+#define        mutex_lock_killable(_m) ({              \
+       MUTEX_SKIP() ? 0 :                      \
+       linux_mutex_lock_interruptible(_m);     \
+})
+
+#define        mutex_lock_killable_nested(_m, _sub)    \
+       mutex_lock_killable(_m)
+
 #define        mutex_unlock(_m) do {                   \
        if (MUTEX_SKIP())                       \
                break;                          \
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