linux-kernel - [PATCH] EDAC/amd64: Shut up an -Werror,-Wsometimes-uninitialized clang false positive

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Date:   Tue, 14 Feb 2023 10:55:51 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Yazen Ghannam <yazen.ghannam@....com>, Tom Rix <trix@...hat.com>,
        tony.luck@...el.com, james.morse@....com, mchehab@...nel.org,
        rric@...nel.org, linux-edac@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] EDAC/amd64: Shut up an -Werror,-Wsometimes-uninitialized
 clang false positive

From: Yazen Ghannam <yazen.ghannam@....com>

Yeah, the code's fine even without this.

What this is fixing is a compiler which is overeager to report false
positives which then get automatically enabled in -Wall builds and when
CONFIG_WERROR is set in allmodconfig builds, the build fails.

It doesn't happen with gcc.

Maybe clang should be more conservative when enabling such warnings
under -Wall as, apparently, this has an impact beyond just noisy output.

  [ bp: Write a commit message. ]

Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Reviewed-by: Nathan Chancellor <nathan@...nel.org>
Link: https://lore.kernel.org/r/Y%2BqdVHidnrrKvxiD@dev-arch.thelio-3990X
---
 drivers/edac/amd64_edac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 1c4bef1cdf28..5b42533f306a 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -3928,7 +3928,7 @@ static const struct attribute_group *amd64_edac_attr_groups[] = {
 
 static int hw_info_get(struct amd64_pvt *pvt)
 {
-	u16 pci_id1, pci_id2;
+	u16 pci_id1 = 0, pci_id2 = 0;
 	int ret;
 
 	if (pvt->fam >= 0x17) {
-- 
2.35.1


-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette