linux-kernel - [PATCH -next] drm/i915: fix i915_globals

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Message-Id: <20210804204147.2070-1-rdunlap@infradead.org>
Date:   Wed,  4 Aug 2021 13:41:47 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Jason Ekstrand <jason@...kstrand.net>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH -next] drm/i915: fix i915_globals_exit() section mismatch error

Fix modpost Section mismatch error in i915_globals_exit().
Since both an __init function and an __exit function can call
i915_globals_exit(), any function that i915_globals_exit() calls
should not be marked as __init or __exit. I.e., it needs to be
available for either of them.

WARNING: modpost: vmlinux.o(.text+0x8b796a): Section mismatch in reference from the function i915_globals_exit() to the function .exit.text:__i915_globals_flush()
The function i915_globals_exit() references a function in an exit section.
Often the function __i915_globals_flush() has valid usage outside the exit section
and the fix is to remove the __exit annotation of __i915_globals_flush.

ERROR: modpost: Section mismatches detected.
Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.

Fixes: 1354d830cb8f ("drm/i915: Call i915_globals_exit() if pci_register_device() fails")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Jason Ekstrand <jason@...kstrand.net>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
Cc: intel-gfx@...ts.freedesktop.org
Cc: dri-devel@...ts.freedesktop.org
---
 drivers/gpu/drm/i915/i915_globals.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linext-2021-0804.orig/drivers/gpu/drm/i915/i915_globals.c
+++ linext-2021-0804/drivers/gpu/drm/i915/i915_globals.c
@@ -138,7 +138,7 @@ void i915_globals_unpark(void)
 	atomic_inc(&active);
 }

-static void __exit __i915_globals_flush(void)
+static void  __i915_globals_flush(void)
 {
 	atomic_inc(&active); /* skip shrinking */