pata_cs5536: Add support for non-X86_32 platforms

pata_cs5536 does work on the other platforms(e.g. Loongson, a MIPS
variant), so, remove the dependency of X86_32 and fix the building
errors under the other platforms via only reserving the X86_32 specific
parts for X86_32.

pata_amd also supports cs5536 IDE controller, but this one saves about
33k for the compressed kernel image(vmlinuz for MIPS).

Signed-off-by: Zhang Le <r0bertz@gentoo.org>
Signed-off-by: Chen Jie <chenj@lemote.com>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 11ec911016c6ab3e81cefe7e202c4cc4c95762f0..cfd04f4e418c49fb8e2fbd4034be17e2f7a9837a 100644 (file)
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -366,7 +366,7 @@ config PATA_CS5535
 
 config PATA_CS5536
        tristate "CS5536 PATA support"
-       depends on PCI && X86 && !X86_64
+       depends on PCI
        help
          This option enables support for the AMD CS5536
          companion chip used with the Geode LX processor family.

diff --git a/drivers/ata/pata_cs5536.c b/drivers/ata/pata_cs5536.c
index 21ee23f89e88b153ee8e35af5d75c61f83f92496..a6e6c963b6ae9ead3a8c4669e26baeee0f28def9 100644 (file)
--- a/drivers/ata/pata_cs5536.c
+++ b/drivers/ata/pata_cs5536.c
@@ -37,10 +37,20 @@
 #include <linux/delay.h>
 #include <linux/libata.h>
 #include <scsi/scsi_host.h>
+
+#ifdef CONFIG_X86_32
 #include <asm/msr.h>
+static int use_msr;
+module_param_named(msr, use_msr, int, 0644);
+MODULE_PARM_DESC(msr, "Force using MSR to configure IDE function (Default: 0)");
+#else
+#define rdmsr(x, y, z) do { } while (0)
+#define wrmsr(x, y, z) do { } while (0)
+#define use_msr 0
+#endif
 
 #define DRV_NAME       "pata_cs5536"
-#define DRV_VERSION    "0.0.7"
+#define DRV_VERSION    "0.0.8"
 
 enum {
        CFG                     = 0,
@@ -75,8 +85,6 @@ enum {
        IDE_ETC_NODMA           = 0x03,
 };
 
-static int use_msr;
-
 static const u32 msr_reg[4] = {
        MSR_IDE_CFG, MSR_IDE_DTC, MSR_IDE_CAST, MSR_IDE_ETC,
 };
@@ -88,7 +96,7 @@ static const u8 pci_reg[4] = {
 static inline int cs5536_read(struct pci_dev *pdev, int reg, u32 *val)
 {
        if (unlikely(use_msr)) {
-               u32 dummy;
+               u32 dummy __maybe_unused;
 
                rdmsr(msr_reg[reg], *val, dummy);
                return 0;
@@ -294,8 +302,6 @@ MODULE_DESCRIPTION("low-level driver for the CS5536 IDE controller");
 MODULE_LICENSE("GPL");
 MODULE_DEVICE_TABLE(pci, cs5536);
 MODULE_VERSION(DRV_VERSION);
-module_param_named(msr, use_msr, int, 0644);
-MODULE_PARM_DESC(msr, "Force using MSR to configure IDE function (Default: 0)");
 
 module_init(cs5536_init);
 module_exit(cs5536_exit);