linux: Update to version 4.19.1

This is a major kernel version update from 4.18 to 4.19 LTS.

While at it, make a few cosmetic improvements to the rdrand-rng
driver:

 - Make the error message more informative -- i.e., make it known that
   the unavailability of RDSEED/RDRAND is tied to the underlying CPU,
   and is not a kernel bug.

 - Also, log the message using pr_info() rather than pr_err(), because
   it is not an error as such -- systems with CPUs that don't support
   RDSEED/RDRAND cannot load this driver, and that is fine.

Change-Id: I06786750ede3977ec94eec03647ed499692d597f
Reviewed-on: http://photon-jenkins.eng.vmware.com:8082/6118
Tested-by: gerrit-photon <[email protected]>
Reviewed-by: Alexey Makhalov <[email protected]>

SPECS/linux-api-headers/linux-api-headers.spec

@@ -1,14 +1,14 @@
 Summary:	Linux API header files
 Name:		linux-api-headers
-Version:	4.18.9
+Version:	4.19.1
 Release:	1%{?dist}
 License:	GPLv2
 URL:		http://www.kernel.org/
 Group:		System Environment/Kernel
 Vendor:		VMware, Inc.
 Distribution: Photon
 Source0:        http://www.kernel.org/pub/linux/kernel/v4.x/linux-%{version}.tar.xz
-%define sha1 linux=229ed4bedc5b8256bdd761845b1d7e20e1df12d7
+%define sha1 linux=5ece7a7149eeef06bba906eeabbc2f29a8ac3952
 BuildArch:	noarch
 %description
 The Linux API Headers expose the kernel's API for use by Glibc.
@@ -25,6 +25,8 @@ find /%{buildroot}%{_includedir} \( -name .install -o -name ..install.cmd \) -de
 %defattr(-,root,root)
 %{_includedir}/*
 %changelog
+*   Mon Nov 05 2018 Srivatsa S. Bhat (VMware) <[email protected]> 4.19.1-1
+-   Update to version 4.19.1
 *   Thu Sep 20 2018 Srivatsa S. Bhat <[email protected]> 4.18.9-1
 -   Update to version 4.18.9
 *   Wed Sep 19 2018 Srivatsa S. Bhat <[email protected]> 4.14.67-1

SPECS/linux/4.18-0001-hwrng-rdrand-Add-RNG-driver-based-on-x86-rdrand-inst.patch

@@ -1,5 +1,5 @@
 From 0fd09a9a3418124e59cded88699d4c6bcdb811b2 Mon Sep 17 00:00:00 2001
-From: "Srivatsa S. Bhat" <[email protected]>
+From: "Srivatsa S. Bhat (VMware)" <[email protected]>
 Date: Tue, 18 Sep 2018 18:33:06 -0700
 Subject: [PATCH] hwrng: rdrand - Add RNG driver based on x86 rdrand
  instruction
@@ -10,16 +10,16 @@ rdrand/rdseed instructions available on modern Intel and AMD CPUs.
 This can be used to feed the kernel's entropy pool on entropy-starved
 virtual machines.
 
-Signed-off-by: Srivatsa S. Bhat <[email protected]>
+Signed-off-by: Srivatsa S. Bhat (VMware) <[email protected]>
 ---
- drivers/char/hw_random/Kconfig      | 14 ++++++++
+ drivers/char/hw_random/Kconfig      | 14 +++++++
  drivers/char/hw_random/Makefile     |  1 +
- drivers/char/hw_random/rdrand-rng.c | 72 +++++++++++++++++++++++++++++++++++++
- 3 files changed, 87 insertions(+)
+ drivers/char/hw_random/rdrand-rng.c | 73 +++++++++++++++++++++++++++++++++++++
+ 3 files changed, 88 insertions(+)
  create mode 100644 drivers/char/hw_random/rdrand-rng.c
 
 diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
-index 95a031e..c7e7ce7 100644
+index dac895d..e6d4fad 100644
 --- a/drivers/char/hw_random/Kconfig
 +++ b/drivers/char/hw_random/Kconfig
 @@ -60,6 +60,20 @@ config HW_RANDOM_AMD
@@ -57,16 +57,16 @@ index e35ec3c..eda6b15 100644
  obj-$(CONFIG_HW_RANDOM_N2RNG) += n2-rng.o
 diff --git a/drivers/char/hw_random/rdrand-rng.c b/drivers/char/hw_random/rdrand-rng.c
 new file mode 100644
-index 0000000..ba017f3
+index 0000000..a2011de
 --- /dev/null
 +++ b/drivers/char/hw_random/rdrand-rng.c
-@@ -0,0 +1,72 @@
+@@ -0,0 +1,73 @@
 +// SPDX-License-Identifier: GPL-2.0
 +/*
 + * RNG driver that uses the RDRAND/RDSEED instructions (found on modern
 + * Intel and AMD CPUs).
 + *
-+ * Author: Srivatsa S. Bhat <[email protected]>
++ * Author: Srivatsa S. Bhat (VMware) <[email protected]>
 + *
 + */
 +
@@ -111,7 +111,8 @@ index 0000000..ba017f3
 +	int err = -ENODEV;
 +
 +	if (!arch_has_random_seed() && !arch_has_random()) {
-+		pr_err(PFX "Neither RDSEED nor RDRAND is available.\n");
++		pr_info(PFX "Cannot load module, as your CPU does not "
++			    "support RDSEED or RDRAND instructions.\n");
 +		return err;
 +	}
 +
@@ -130,7 +131,7 @@ index 0000000..ba017f3
 +module_init(mod_init);
 +module_exit(mod_exit);
 +
-+MODULE_AUTHOR("Srivatsa S. Bhat <[email protected]>");
++MODULE_AUTHOR("Srivatsa S. Bhat (VMware) <[email protected]>");
 +MODULE_DESCRIPTION("H/W RNG driver for x86 CPUs that support RDRAND/RDSEED");
 +MODULE_LICENSE("GPL");
 --