linux-kernel - [PATCH 1/3] x86/platform: make atom/pmc

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Date:	Mon, 24 Aug 2015 19:34:53 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	<x86@...nel.org>
CC:	<linux-kernel@...r.kernel.org>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH 1/3] x86/platform: make atom/pmc_atom.c explicitly non-modular

The Kconfig currently controlling compilation of this code is:

config PMC_ATOM
        def_bool y

...meaning that it currently is not being built as a module by anyone.

Lets remove the couple traces of modularity so that when reading the
driver there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.

We leave some tags like MODULE_AUTHOR for documentation purposes.

Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.
We correct a comment that indicates the data was only used by that
macro, as it actually is used by the code directly.

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: x86@...nel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 arch/x86/platform/atom/pmc_atom.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/arch/x86/platform/atom/pmc_atom.c b/arch/x86/platform/atom/pmc_atom.c
index e814d341a703..964ff4fc61f9 100644
--- a/arch/x86/platform/atom/pmc_atom.c
+++ b/arch/x86/platform/atom/pmc_atom.c
@@ -15,7 +15,6 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
-#include <linux/module.h>
 #include <linux/init.h>
 #include <linux/pci.h>
 #include <linux/device.h>
@@ -422,10 +421,7 @@ static int pmc_setup_dev(struct pci_dev *pdev, const struct pci_device_id *ent)
 /*
  * Data for PCI driver interface
  *
- * This data only exists for exporting the supported
- * PCI ids via MODULE_DEVICE_TABLE.  We do not actually
- * register a pci_driver, because lpc_ich will register
- * a driver on the same PCI id.
+ * used by pci_match_id() call below.
  */
 static const struct pci_device_id pmc_pci_ids[] = {
 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_VLV_PMC), (kernel_ulong_t)&byt_reg_map },
@@ -433,8 +429,6 @@ static const struct pci_device_id pmc_pci_ids[] = {
 	{ 0, },
 };
 
-MODULE_DEVICE_TABLE(pci, pmc_pci_ids);
-
 static int __init pmc_atom_init(void)
 {
 	struct pci_dev *pdev = NULL;
@@ -457,9 +451,10 @@ static int __init pmc_atom_init(void)
 	return -ENODEV;
 }
 
-module_init(pmc_atom_init);
-/* no module_exit, this driver shouldn't be unloaded */
+device_initcall(pmc_atom_init);
 
+/*
 MODULE_AUTHOR("Aubrey Li <aubrey.li@...ux.intel.com>");
 MODULE_DESCRIPTION("Intel Atom SOC Power Management Controller Interface");
 MODULE_LICENSE("GPL v2");
+*/
-- 
2.5.0

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