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@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org # needed for linux-5.4-y
Link: https://lore.kernel.org/all/20241128111844.GE10431@google.com/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 0584cbcdbd2d65d0c80932af35f2ae518125a022..fb787a5715f5e8b37713162979ca45355770dc73 100644 (file)
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -772,7 +772,7 @@ static void check_section(const char *modname, struct elf_info *elf,
                ".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