linux-kernel - [PATCH 1/2] block: parse cmdline partitions first

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Message-Id: <8a6b11c6ada5d55bdb2b1f8319e47bbf5192654b.1634856658.git.mirq-linux@rere.qmqm.pl>
Date:   Fri, 22 Oct 2021 00:51:23 +0200
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Jens Axboe <axboe@...nel.dk>, Jonathan Corbet <corbet@....net>
Cc:     linux-block@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] block: parse cmdline partitions first

Make sure cmdline-provided partitions can override anything that's
on a storage device.

Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
---
 block/partitions/core.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/block/partitions/core.c b/block/partitions/core.c
index 66ef9bc6d6a1..b4dac3077dce 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -15,6 +15,13 @@
 #include "check.h"
 
 static int (*check_part[])(struct parsed_partitions *) = {
+	/*
+	 * Let cmdline override whatever there is on disk.
+	 */
+#ifdef CONFIG_CMDLINE_PARTITION
+	cmdline_partition,
+#endif
+
 	/*
 	 * Probe partition formats with tables at disk address 0
 	 * that also have an ADFS boot block at 0xdc0.
@@ -42,9 +49,6 @@ static int (*check_part[])(struct parsed_partitions *) = {
 	adfspart_check_ADFS,
 #endif
 
-#ifdef CONFIG_CMDLINE_PARTITION
-	cmdline_partition,
-#endif
 #ifdef CONFIG_EFI_PARTITION
 	efi_partition,		/* this must come before msdos */
 #endif
-- 
2.30.2