[PATCH 5.4.y] modpost: Add .irqentry.text to OTHER_SECTIONS

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From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

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@xxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # needed for linux-5.4-y
Link: https://lore.kernel.org/all/20241128111844.GE10431@xxxxxxxxxx/
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
(cherry picked from commit 7912405643a14b527cd4a4f33c1d4392da900888)
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
---
 scripts/mod/modpost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 53e276bb24ac..cb8858388a22 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -963,7 +963,7 @@ static void check_section(const char *modname, struct elf_info *elf,
 		".kprobes.text", ".cpuidle.text", ".noinstr.text"
 #define OTHER_TEXT_SECTIONS ".ref.text", ".head.text", ".spinlock.text", \
 		".fixup", ".entry.text", ".exception.text", ".text.*", \
-		".coldtext"
+		".coldtext", ".irqentry.text"
 
 #define INIT_SECTIONS      ".init.*"
 #define MEM_INIT_SECTIONS  ".meminit.*"
-- 
2.47.1.613.gc27f4b7a9f-goog





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