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>

diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 18c81cbe4704ca83ca1919e81a14160bb7353981..536e55d3919fd2f6a359c769844e684617dfd1d2 100644 (file)
--- 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---