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kernel-fxtec-pro1x/drivers/video/efifb.c
Wanlong Gao e6b8480cdf efifb: Fix call to wrong unregister function 
platform_device_unregister() needs to unregister the device, not the
driver.

Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com>
Signed-off-by: Maarten Lankhorst <m.b.lankhorst@gmail.com>
Acked-by: Andy Lutomirski <luto@mit.edu>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-14 16:37:46 +09:00

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/*
* Framebuffer driver for EFI/UEFI based system
*
* (c) 2006 Edgar Hucek <gimli@dark-green.com>
* Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>
#include <linux/dmi.h>
#include <linux/pci.h>
#include <video/vga.h>
static bool request_mem_succeeded = false;
static struct fb_var_screeninfo efifb_defined __devinitdata = {
.activate = FB_ACTIVATE_NOW,
.height = -1,
.width = -1,
.right_margin = 32,
.upper_margin = 16,
.lower_margin = 4,
.vsync_len = 4,
.vmode = FB_VMODE_NONINTERLACED,
};
static struct fb_fix_screeninfo efifb_fix __devinitdata = {
.id = "EFI VGA",
.type = FB_TYPE_PACKED_PIXELS,
.accel = FB_ACCEL_NONE,
.visual = FB_VISUAL_TRUECOLOR,
};
enum {
M_I17, /* 17-Inch iMac */
M_I20, /* 20-Inch iMac */
M_I20_SR, /* 20-Inch iMac (Santa Rosa) */
M_I24, /* 24-Inch iMac */
M_I24_8_1, /* 24-Inch iMac, 8,1th gen */
M_I24_10_1, /* 24-Inch iMac, 10,1th gen */
M_I27_11_1, /* 27-Inch iMac, 11,1th gen */
M_MINI, /* Mac Mini */
M_MINI_3_1, /* Mac Mini, 3,1th gen */
M_MINI_4_1, /* Mac Mini, 4,1th gen */
M_MB, /* MacBook */
M_MB_2, /* MacBook, 2nd rev. */
M_MB_3, /* MacBook, 3rd rev. */
M_MB_5_1, /* MacBook, 5th rev. */
M_MB_6_1, /* MacBook, 6th rev. */
M_MB_7_1, /* MacBook, 7th rev. */
M_MB_SR, /* MacBook, 2nd gen, (Santa Rosa) */
M_MBA, /* MacBook Air */
M_MBA_3, /* Macbook Air, 3rd rev */
M_MBP, /* MacBook Pro */
M_MBP_2, /* MacBook Pro 2nd gen */
M_MBP_2_2, /* MacBook Pro 2,2nd gen */
M_MBP_SR, /* MacBook Pro (Santa Rosa) */
M_MBP_4, /* MacBook Pro, 4th gen */
M_MBP_5_1, /* MacBook Pro, 5,1th gen */
M_MBP_5_2, /* MacBook Pro, 5,2th gen */
M_MBP_5_3, /* MacBook Pro, 5,3rd gen */
M_MBP_6_1, /* MacBook Pro, 6,1th gen */
M_MBP_6_2, /* MacBook Pro, 6,2th gen */
M_MBP_7_1, /* MacBook Pro, 7,1th gen */
M_MBP_8_2, /* MacBook Pro, 8,2nd gen */
M_UNKNOWN /* placeholder */
};
#define OVERRIDE_NONE 0x0
#define OVERRIDE_BASE 0x1
#define OVERRIDE_STRIDE 0x2
#define OVERRIDE_HEIGHT 0x4
#define OVERRIDE_WIDTH 0x8
static struct efifb_dmi_info {
char *optname;
unsigned long base;
int stride;
int width;
int height;
int flags;
} dmi_list[] __initdata = {
[M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
[M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
[M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
[M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
[M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
[M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
[M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
[M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
[M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
[M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
[M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
[M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
[M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
[M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
[M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
/* 11" Macbook Air 3,1 passes the wrong stride */
[M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
[M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
[M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
[M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
[M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
[M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
[M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
[M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
[M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
[M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
[M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
[M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
[M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
[M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
};
static int set_system(const struct dmi_system_id *id);
#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
{ set_system, name, { \
DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
DMI_MATCH(DMI_PRODUCT_NAME, name) }, \
&dmi_list[enumid] }
static const struct dmi_system_id dmi_system_table[] __initconst = {
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
{},
};
#define choose_value(dmivalue, fwvalue, field, flags) ({ \
typeof(fwvalue) _ret_ = fwvalue; \
if ((flags) & (field)) \
_ret_ = dmivalue; \
else if ((fwvalue) == 0) \
_ret_ = dmivalue; \
_ret_; \
})
static int set_system(const struct dmi_system_id *id)
{
struct efifb_dmi_info *info = id->driver_data;
if (info->base == 0 && info->height == 0 && info->width == 0
&& info->stride == 0)
return 0;
/* Trust the bootloader over the DMI tables */
if (screen_info.lfb_base == 0) {
#if defined(CONFIG_PCI)
struct pci_dev *dev = NULL;
int found_bar = 0;
#endif
if (info->base) {
screen_info.lfb_base = choose_value(info->base,
screen_info.lfb_base, OVERRIDE_BASE,
info->flags);
#if defined(CONFIG_PCI)
/* make sure that the address in the table is actually
* on a VGA device's PCI BAR */
for_each_pci_dev(dev) {
int i;
if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
continue;
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
resource_size_t start, end;
start = pci_resource_start(dev, i);
if (start == 0)
break;
end = pci_resource_end(dev, i);
if (screen_info.lfb_base >= start &&
screen_info.lfb_base < end) {
found_bar = 1;
}
}
}
if (!found_bar)
screen_info.lfb_base = 0;
#endif
}
}
if (screen_info.lfb_base) {
screen_info.lfb_linelength = choose_value(info->stride,
screen_info.lfb_linelength, OVERRIDE_STRIDE,
info->flags);
screen_info.lfb_width = choose_value(info->width,
screen_info.lfb_width, OVERRIDE_WIDTH,
info->flags);
screen_info.lfb_height = choose_value(info->height,
screen_info.lfb_height, OVERRIDE_HEIGHT,
info->flags);
if (screen_info.orig_video_isVGA == 0)
screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
} else {
screen_info.lfb_linelength = 0;
screen_info.lfb_width = 0;
screen_info.lfb_height = 0;
screen_info.orig_video_isVGA = 0;
return 0;
}
printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
"(%dx%d, stride %d)\n", id->ident,
screen_info.lfb_base, screen_info.lfb_width,
screen_info.lfb_height, screen_info.lfb_linelength);
return 1;
}
static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
/*
* Set a single color register. The values supplied are
* already rounded down to the hardware's capabilities
* (according to the entries in the `var' structure). Return
* != 0 for invalid regno.
*/
if (regno >= info->cmap.len)
return 1;
if (regno < 16) {
red >>= 8;
green >>= 8;
blue >>= 8;
((u32 *)(info->pseudo_palette))[regno] =
(red << info->var.red.offset) |
(green << info->var.green.offset) |
(blue << info->var.blue.offset);
}
return 0;
}
static void efifb_destroy(struct fb_info *info)
{
if (info->screen_base)
iounmap(info->screen_base);
if (request_mem_succeeded)
release_mem_region(info->apertures->ranges[0].base,
info->apertures->ranges[0].size);
framebuffer_release(info);
}
static struct fb_ops efifb_ops = {
.owner = THIS_MODULE,
.fb_destroy = efifb_destroy,
.fb_setcolreg = efifb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static int __init efifb_setup(char *options)
{
char *this_opt;
int i;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!*this_opt) continue;
for (i = 0; i < M_UNKNOWN; i++) {
if (!strcmp(this_opt, dmi_list[i].optname) &&
dmi_list[i].base != 0) {
screen_info.lfb_base = dmi_list[i].base;
screen_info.lfb_linelength = dmi_list[i].stride;
screen_info.lfb_width = dmi_list[i].width;
screen_info.lfb_height = dmi_list[i].height;
}
}
if (!strncmp(this_opt, "base:", 5))
screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
else if (!strncmp(this_opt, "stride:", 7))
screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4;
else if (!strncmp(this_opt, "height:", 7))
screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0);
else if (!strncmp(this_opt, "width:", 6))
screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0);
}
return 0;
}
static int __init efifb_probe(struct platform_device *dev)
{
struct fb_info *info;
int err;
unsigned int size_vmode;
unsigned int size_remap;
unsigned int size_total;
if (!screen_info.lfb_depth)
screen_info.lfb_depth = 32;
if (!screen_info.pages)
screen_info.pages = 1;
if (!screen_info.lfb_base) {
printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
return -ENODEV;
}
printk(KERN_INFO "efifb: probing for efifb\n");
/* just assume they're all unset if any are */
if (!screen_info.blue_size) {
screen_info.blue_size = 8;
screen_info.blue_pos = 0;
screen_info.green_size = 8;
screen_info.green_pos = 8;
screen_info.red_size = 8;
screen_info.red_pos = 16;
screen_info.rsvd_size = 8;
screen_info.rsvd_pos = 24;
}
efifb_fix.smem_start = screen_info.lfb_base;
efifb_defined.bits_per_pixel = screen_info.lfb_depth;
efifb_defined.xres = screen_info.lfb_width;
efifb_defined.yres = screen_info.lfb_height;
efifb_fix.line_length = screen_info.lfb_linelength;
/* size_vmode -- that is the amount of memory needed for the
* used video mode, i.e. the minimum amount of
* memory we need. */
size_vmode = efifb_defined.yres * efifb_fix.line_length;
/* size_total -- all video memory we have. Used for
* entries, ressource allocation and bounds
* checking. */
size_total = screen_info.lfb_size;
if (size_total < size_vmode)
size_total = size_vmode;
/* size_remap -- the amount of video memory we are going to
* use for efifb. With modern cards it is no
* option to simply use size_total as that
* wastes plenty of kernel address space. */
size_remap = size_vmode * 2;
if (size_remap > size_total)
size_remap = size_total;
if (size_remap % PAGE_SIZE)
size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);
efifb_fix.smem_len = size_remap;
if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) {
request_mem_succeeded = true;
} else {
/* We cannot make this fatal. Sometimes this comes from magic
spaces our resource handlers simply don't know about */
printk(KERN_WARNING
"efifb: cannot reserve video memory at 0x%lx\n",
efifb_fix.smem_start);
}
info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
if (!info) {
printk(KERN_ERR "efifb: cannot allocate framebuffer\n");
err = -ENOMEM;
goto err_release_mem;
}
info->pseudo_palette = info->par;
info->par = NULL;
info->apertures = alloc_apertures(1);
if (!info->apertures) {
err = -ENOMEM;
goto err_release_fb;
}
info->apertures->ranges[0].base = efifb_fix.smem_start;
info->apertures->ranges[0].size = size_remap;
info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len);
if (!info->screen_base) {
printk(KERN_ERR "efifb: abort, cannot ioremap video memory "
"0x%x @ 0x%lx\n",
efifb_fix.smem_len, efifb_fix.smem_start);
err = -EIO;
goto err_release_fb;
}
printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
"using %dk, total %dk\n",
efifb_fix.smem_start, info->screen_base,
size_remap/1024, size_total/1024);
printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
efifb_defined.xres, efifb_defined.yres,
efifb_defined.bits_per_pixel, efifb_fix.line_length,
screen_info.pages);
efifb_defined.xres_virtual = efifb_defined.xres;
efifb_defined.yres_virtual = efifb_fix.smem_len /
efifb_fix.line_length;
printk(KERN_INFO "efifb: scrolling: redraw\n");
efifb_defined.yres_virtual = efifb_defined.yres;
/* some dummy values for timing to make fbset happy */
efifb_defined.pixclock = 10000000 / efifb_defined.xres *
1000 / efifb_defined.yres;
efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8;
efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8;
efifb_defined.red.offset = screen_info.red_pos;
efifb_defined.red.length = screen_info.red_size;
efifb_defined.green.offset = screen_info.green_pos;
efifb_defined.green.length = screen_info.green_size;
efifb_defined.blue.offset = screen_info.blue_pos;
efifb_defined.blue.length = screen_info.blue_size;
efifb_defined.transp.offset = screen_info.rsvd_pos;
efifb_defined.transp.length = screen_info.rsvd_size;
printk(KERN_INFO "efifb: %s: "
"size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
"Truecolor",
screen_info.rsvd_size,
screen_info.red_size,
screen_info.green_size,
screen_info.blue_size,
screen_info.rsvd_pos,
screen_info.red_pos,
screen_info.green_pos,
screen_info.blue_pos);
efifb_fix.ypanstep = 0;
efifb_fix.ywrapstep = 0;
info->fbops = &efifb_ops;
info->var = efifb_defined;
info->fix = efifb_fix;
info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE;
if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) {
printk(KERN_ERR "efifb: cannot allocate colormap\n");
goto err_unmap;
}
if ((err = register_framebuffer(info)) < 0) {
printk(KERN_ERR "efifb: cannot register framebuffer\n");
goto err_fb_dealoc;
}
printk(KERN_INFO "fb%d: %s frame buffer device\n",
info->node, info->fix.id);
return 0;
err_fb_dealoc:
fb_dealloc_cmap(&info->cmap);
err_unmap:
iounmap(info->screen_base);
err_release_fb:
framebuffer_release(info);
err_release_mem:
if (request_mem_succeeded)
release_mem_region(efifb_fix.smem_start, size_total);
return err;
}
static struct platform_driver efifb_driver = {
.driver = {
.name = "efifb",
},
};
static struct platform_device efifb_device = {
.name = "efifb",
};
static int __init efifb_init(void)
{
int ret;
char *option = NULL;
dmi_check_system(dmi_system_table);
if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
return -ENODEV;
if (fb_get_options("efifb", &option))
return -ENODEV;
efifb_setup(option);
/* We don't get linelength from UGA Draw Protocol, only from
* EFI Graphics Protocol. So if it's not in DMI, and it's not
* passed in from the user, we really can't use the framebuffer.
*/
if (!screen_info.lfb_linelength)
return -ENODEV;
ret = platform_device_register(&efifb_device);
if (ret)
return ret;
/*
* This is not just an optimization. We will interfere
* with a real driver if we get reprobed, so don't allow
* it.
*/
ret = platform_driver_probe(&efifb_driver, efifb_probe);
if (ret) {
platform_device_unregister(&efifb_device);
return ret;
}
return ret;
}
module_init(efifb_init);
MODULE_LICENSE("GPL");
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