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tpm: Make SECURITYFS a weak dependency

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>
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PeterHuewe authored and jsakkine-intel committed Sep 3, 2018
1 parent 0d6d0d6 commit 2f7d8dbb11287cbe9da6380ca14ed5d38c9ed91f
Showing with 1 addition and 1 deletion.
  1. +1 −1 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---

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