Thread (60 messages) 60 messages, 13 authors, 2023-02-10

Re: [PATCH 11/18] platform/x86: int3472: fix object shared between several modules

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: 2022-11-20 13:55:36
Also in: linux-kbuild, lkml

On Sat, Nov 19, 2022 at 11:08:17PM +0000, Alexander Lobakin wrote:
common.o is linked to both intel_skl_int3472_{discrete,tps68470}:
quoted
scripts/Makefile.build:252: ./drivers/platform/x86/intel/int3472/Makefile:
common.o is added to multiple modules: intel_skl_int3472_discrete
intel_skl_int3472_tps68470
Although both drivers share one Kconfig option
(CONFIG_INTEL_SKL_INT3472), it's better to not link one object file
into several modules (and/or vmlinux).
Under certain circumstances, such can lead to the situation fixed by
commit 637a642f5ca5 ("zstd: Fixing mixed module-builtin objects").

Introduce the new module, intel_skl_int3472_common, to provide the
functions from common.o to both discrete and tps68470 drivers. This
adds only 3 exports and doesn't provide any changes to the actual
code.
...
+MODULE_IMPORT_NS(INTEL_SKL_INT3472);
+
Redundant blank line. You may put it to be last MODULE_*() in the file, if you
think it would be more visible.
 MODULE_DESCRIPTION("Intel SkyLake INT3472 ACPI Discrete Device Driver");
 MODULE_AUTHOR("Daniel Scally [off-list ref]");
 MODULE_LICENSE("GPL v2");
...
+MODULE_IMPORT_NS(INTEL_SKL_INT3472);
+
 MODULE_DESCRIPTION("Intel SkyLake INT3472 ACPI TPS68470 Device Driver");
 MODULE_AUTHOR("Daniel Scally [off-list ref]");
 MODULE_LICENSE("GPL v2");
Ditto. And the same to all your patches.

-- 
With Best Regards,
Andy Shevchenko

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