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Date: Mon, 15 Jun 2020 12:02:36 +0800
From: Jason Yan <>
To: <>, <>,
	<>, <>
CC: <>, Jason Yan <>,
	Kees Cook <>
Subject: [PATCH] ata: Eliminate usage of uninitialized_var() macro

This is an effort to eliminate the uninitialized_var() macro[1].

The use of this macro is the wrong solution because it forces off ANY
analysis by the compiler for a given variable. It even masks "unused
variable" warnings.

Quoted from Linus[2]:

"It's a horrible thing to use, in that it adds extra cruft to the
source code, and then shuts up a compiler warning (even the _reliable_
warnings from gcc)."

The gcc option "-Wmaybe-uninitialized" has been disabled and this change
will not produce any warnnings even with "make W=1".


Cc: Kees Cook <>
Signed-off-by: Jason Yan <>
 drivers/ata/libata-scsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 435781a16875..fcb00f2825fe 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -93,7 +93,7 @@ static ssize_t ata_scsi_park_show(struct device *device,
 	struct ata_link *link;
 	struct ata_device *dev;
 	unsigned long now;
-	unsigned int uninitialized_var(msecs);
+	unsigned int msecs;
 	int rc = 0;
 	ap = ata_shost_to_port(sdev->host);

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