linux-kernel - [PATCH] modpost: Add .irqentry.text to OTHER

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Message-ID: <87iks3wt2t.ffs@tglx>
Date: Sun, 01 Dec 2024 12:17:30 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Sergey Senozhatsky <senozhatsky@...omium.org>
Cc: 20241015061522.25288-1-rui.zhang@...el.com, Zhang Rui
 <rui.zhang@...el.com>, hpa@...or.com, peterz@...radead.org,
 thorsten.blum@...lux.com, yuntao.wang@...ux.dev, tony.luck@...el.com,
 len.brown@...el.com, srinivas.pandruvada@...el.com,
 linux-kernel@...r.kernel.org, stable@...r.kernel.org, mingo@...hat.com,
 bp@...en8.de, dave.hansen@...ux.intel.com, rafael.j.wysocki@...el.com,
 x86@...nel.org, linux-pm@...r.kernel.org, Sergey Senozhatsky
 <senozhatsky@...omium.org>, Masahiro Yamada <masahiroy@...nel.org>, Nathan
 Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>,
 linux-kbuild@...r.kernel.org
Subject: [PATCH] modpost: Add .irqentry.text to OTHER_SECTIONS

The compiler can fully inline the actual handler function of an interrupt
entry into the .irqentry.text entry point. If such a function contains an
access which has an exception table entry, modpost complains about a
section mismatch:

  WARNING: vmlinux.o(__ex_table+0x447c): Section mismatch in reference ...

  The relocation at __ex_table+0x447c references section ".irqentry.text"
  which is not in the list of authorized sections.

Add .irqentry.text to OTHER_SECTIONS to cure the issue.

Reported-by: Sergey Senozhatsky <senozhatsky@...omium.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: stable@...r.kernel.org
---
 scripts/mod/modpost.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -785,7 +785,7 @@ static void check_section(const char *mo
 		".ltext", ".ltext.*"
 #define OTHER_TEXT_SECTIONS ".ref.text", ".head.text", ".spinlock.text", \
 		".fixup", ".entry.text", ".exception.text", \
-		".coldtext", ".softirqentry.text"
+		".coldtext", ".softirqentry.text", ".irqentry.text"
 
 #define ALL_TEXT_SECTIONS  ".init.text", ".exit.text", \
 		TEXT_SECTIONS, OTHER_TEXT_SECTIONS