Merge remote-tracking branch 'remotes/vivier2/tags/trivial-branch-pull-request' into staging

Documentation update and a typo fix

# gpg: Signature made Tue 22 Oct 2019 09:25:35 BST
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/trivial-branch-pull-request:
  tests/migration: fix a typo in comment
  qemu-doc: Remove paragraph about requiring a HD image with -kernel
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

qemu-doc.texi

@@ -906,10 +906,6 @@ Use @option{-kernel} to provide the Linux kernel image and
 @option{-append} to give the kernel command line arguments. The
 @option{-initrd} option can be used to provide an INITRD image.
 
-When using the direct Linux boot, a disk image for the first hard disk
-@file{hda} is required because its boot sector is used to launch the
-Linux kernel.
-
 If you do not need graphical output, you can disable it and redirect
 the virtual serial port and the QEMU monitor to the console with the
 @option{-nographic} option. The typical command line is:

tests/migration/stress.c

@@ -192,7 +192,7 @@ static int stressone(unsigned long long ramsizeMB)
 
     /* We don't care about initial state, but we do want
      * to fault it all into RAM, otherwise the first iter
-     * of the loop below will be quite slow. We cna't use
+     * of the loop below will be quite slow. We can't use
      * 0x0 as the byte as gcc optimizes that away into a
      * calloc instead :-) */
     memset(ram, 0xfe, ramsizeMB * 1024 * 1024);