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From: Ahmad Fatoum <>
Cc:, Ahmad Fatoum <>
Subject: [PATCH 1/3] partitions: efi: register guid device parameter for disk GUID
Date: Thu, 30 Jun 2022 14:40:33 +0200	[thread overview]
Message-ID: <> (raw)

We already register an nt_signature parameter for MBR partitions.
Register an equivalent guid parameter for GPT partitions as well.
This is less critical because disk GUID isn't used for root=
Linux boot argument computation, as each partition has its own
PARTUUID. It's still useful to allow shell scripts to check
against it to detect e.g. a factory flash image.

Signed-off-by: Ahmad Fatoum <>
 common/partitions/efi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/partitions/efi.c b/common/partitions/efi.c
index 848bed22610f..0f3f790539cd 100644
--- a/common/partitions/efi.c
+++ b/common/partitions/efi.c
@@ -446,6 +446,7 @@ static void efi_partition(void *buf, struct block_device *blk,
 	snprintf(blk->cdev.uuid, sizeof(blk->cdev.uuid), "%pUl", &gpt->disk_guid);
+	dev_add_param_string_fixed(blk->dev, "guid", blk->cdev.uuid);
 	nb_part = le32_to_cpu(gpt->num_partition_entries);

             reply	other threads:[~2022-06-30 12:42 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-30 12:40 Ahmad Fatoum [this message]
2022-06-30 12:40 ` [PATCH 2/3] commands: implement devlookup to find device behind device file Ahmad Fatoum
2022-06-30 15:26   ` Michael Olbrich
2022-07-01  5:24     ` Ahmad Fatoum
2022-07-05  7:45   ` Sascha Hauer
2022-07-05  7:48     ` Ahmad Fatoum
2022-06-30 12:40 ` [PATCH 3/3] block: efi: allow disabling /dev/usbdiskX renaming Ahmad Fatoum
2022-06-30 13:26   ` [PATCH] fixup! commands: implement new devlookup command Ahmad Fatoum

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