Documentation: Fix multiple typo in Documentation

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Documentation/security/Smack.txt

@@ -536,6 +536,6 @@ writing a single character to the /smack/logging file :
 3 : log denied & accepted
 
 Events are logged as 'key=value' pairs, for each event you at least will get
-the subjet, the object, the rights requested, the action, the kernel function
+the subject, the object, the rights requested, the action, the kernel function
 that triggered the event, plus other pairs depending on the type of event
 audited.

Documentation/security/keys-trusted-encrypted.txt

@@ -1,7 +1,7 @@
 			Trusted and Encrypted Keys
 
 Trusted and Encrypted Keys are two new key types added to the existing kernel
-key ring service.  Both of these new types are variable length symmetic keys,
+key ring service.  Both of these new types are variable length symmetric keys,
 and in both cases all keys are created in the kernel, and user space sees,
 stores, and loads only encrypted blobs.  Trusted Keys require the availability
 of a Trusted Platform Module (TPM) chip for greater security, while Encrypted

Documentation/security/keys.txt

@@ -668,7 +668,7 @@ The keyctl syscall functions are:
 
      If the kernel calls back to userspace to complete the instantiation of a
      key, userspace should use this call mark the key as negative before the
-     invoked process returns if it is unable to fulfil the request.
+     invoked process returns if it is unable to fulfill the request.
 
      The process must have write access on the key to be able to instantiate
      it, and the key must be uninstantiated.