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tpm: change 'tpm_suspend_pcr' to be module parameter

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Fix the following warning:

drivers/char/tpm/tpm.c:1085: warning: `tpm_suspend_setup' defined but not used

and make the workaround operable in case when TPM is compiled as a module.
As a side-effect the option will be called tpm.suspend_pcr.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Cc: David Safford <safford@watson.ibm.com>
Cc: James Morris <jmorris@namei.org>
Cc: Debora Velarde <debora@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Dmitry Torokhov 2010-10-01 14:16:39 -07:00 committed by James Morris
parent 36f7f28416
commit 9b3056cca0
1 changed files with 10 additions and 12 deletions
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22
drivers/char/tpm/tpm.c
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@ -47,6 +47,16 @@ enum tpm_duration {
#define TPM_MAX_PROTECTED_ORDINAL 12
#define TPM_PROTECTED_ORDINAL_MASK 0xFF
/*
* Bug workaround - some TPM's don't flush the most
* recently changed pcr on suspend, so force the flush
* with an extend to the selected _unused_ non-volatile pcr.
*/
static int tpm_suspend_pcr;
module_param_named(suspend_pcr, tpm_suspend_pcr, uint, 0644);
MODULE_PARM_DESC(suspend_pcr,
"PCR to use for dummy writes to faciltate flush on suspend.");
static LIST_HEAD(tpm_chip_list);
static DEFINE_SPINLOCK(driver_lock);
static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
@ -1077,18 +1087,6 @@ static struct tpm_input_header savestate_header = {
.ordinal = TPM_ORD_SAVESTATE
};
/* Bug workaround - some TPM's don't flush the most
* recently changed pcr on suspend, so force the flush
* with an extend to the selected _unused_ non-volatile pcr.
*/
static int tpm_suspend_pcr;
static int __init tpm_suspend_setup(char *str)
{
get_option(&str, &tpm_suspend_pcr);
return 1;
}
__setup("tpm_suspend_pcr=", tpm_suspend_setup);
/*
* We are about to suspend. Save the TPM state
* so that it can be restored.