+ tpm-change-tpm_suspend_pcr-to-be-module-parameter.patch added to -mm tree

+ tpm-change-tpm_suspend_pcr-to-be-module-parameter.patch added to -mm tree

[akpm]

The patch titled
     tpm: change 'tpm_suspend_pcr' to be module parameter
has been added to the -mm tree.  Its filename is
     tpm-change-tpm_suspend_pcr-to-be-module-parameter.patch

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------------------------------------------------------
Subject: tpm: change 'tpm_suspend_pcr' to be module parameter
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

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>
---

 drivers/char/tpm/tpm.c |   22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff -puN drivers/char/tpm/tpm.c~tpm-change-tpm_suspend_pcr-to-be-module-parameter drivers/char/tpm/tpm.c
--- a/drivers/char/tpm/tpm.c~tpm-change-tpm_suspend_pcr-to-be-module-parameter
+++ a/drivers/char/tpm/tpm.c
@@ -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
 	.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);