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openmptcprouter/root/target/linux/brcm2708/patches-4.19/0286-tpm-Make-SECURITYFS-a-weak-dependency.patch
2019-04-22 17:10:09 +02:00

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From b641c7a1f9d3bc5b3b21b512178bc162e4c1eac6 Mon Sep 17 00:00:00 2001
From: Peter Huewe <peterhuewe@gmx.de>
Date: Mon, 3 Sep 2018 21:51:51 +0200
Subject: [PATCH 286/432] tpm: Make SECURITYFS a weak dependency
commit 2f7d8dbb11287cbe9da6380ca14ed5d38c9ed91f upstream.
While having SECURITYFS enabled for the tpm subsystem is beneficial in
most cases, it is not strictly necessary to have it enabled at all.
Especially on platforms without any boot firmware integration of the TPM
(e.g. raspberry pi) it does not add any value for the tpm subsystem,
as there is no eventlog present.
By turning it from 'select' to 'imply' it still gets selected per
default, but enables users who want to save some kb of ram by turning
SECURITYFS off.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 18c81cbe4704..536e55d3919f 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -5,7 +5,7 @@
menuconfig TCG_TPM
tristate "TPM Hardware Support"
depends on HAS_IOMEM
- select SECURITYFS
+ imply SECURITYFS
select CRYPTO
select CRYPTO_HASH_INFO
---help---
--
2.19.1