mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
177 lines
4.6 KiB
C
177 lines
4.6 KiB
C
/*
|
|
* linux/drivers/video/maxinefb.c
|
|
*
|
|
* DECstation 5000/xx onboard framebuffer support ... derived from:
|
|
* "HP300 Topcat framebuffer support (derived from macfb of all things)
|
|
* Phil Blundell <philb@gnu.org> 1998", the original code can be
|
|
* found in the file hpfb.c in the same directory.
|
|
*
|
|
* DECstation related code Copyright (C) 1999,2000,2001 by
|
|
* Michael Engel <engel@unix-ag.org> and
|
|
* Karsten Merker <merker@linuxtag.org>.
|
|
* This file is subject to the terms and conditions of the GNU General
|
|
* Public License. See the file COPYING in the main directory of this
|
|
* archive for more details.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Changes:
|
|
* 2001/01/27 removed debugging and testing code, fixed fb_ops
|
|
* initialization which had caused a crash before,
|
|
* general cleanup, first official release (KM)
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/init.h>
|
|
#include <linux/fb.h>
|
|
#include <video/maxinefb.h>
|
|
|
|
/* bootinfo.h defines the machine type values, needed when checking */
|
|
/* whether are really running on a maxine, KM */
|
|
#include <asm/bootinfo.h>
|
|
|
|
static struct fb_info fb_info;
|
|
|
|
static struct fb_var_screeninfo maxinefb_defined = {
|
|
.xres = 1024,
|
|
.yres = 768,
|
|
.xres_virtual = 1024,
|
|
.yres_virtual = 768,
|
|
.bits_per_pixel =8,
|
|
.activate = FB_ACTIVATE_NOW,
|
|
.height = -1,
|
|
.width = -1,
|
|
.vmode = FB_VMODE_NONINTERLACED,
|
|
};
|
|
|
|
static struct fb_fix_screeninfo maxinefb_fix = {
|
|
.id = "Maxine",
|
|
.smem_len = (1024*768),
|
|
.type = FB_TYPE_PACKED_PIXELS,
|
|
.visual = FB_VISUAL_PSEUDOCOLOR,
|
|
.line_length = 1024,
|
|
};
|
|
|
|
/* Handle the funny Inmos RamDAC/video controller ... */
|
|
|
|
void maxinefb_ims332_write_register(int regno, register unsigned int val)
|
|
{
|
|
register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS;
|
|
unsigned char *wptr;
|
|
|
|
wptr = regs + 0xa0000 + (regno << 4);
|
|
*((volatile unsigned int *) (regs)) = (val >> 8) & 0xff00;
|
|
*((volatile unsigned short *) (wptr)) = val;
|
|
}
|
|
|
|
unsigned int maxinefb_ims332_read_register(int regno)
|
|
{
|
|
register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS;
|
|
unsigned char *rptr;
|
|
register unsigned int j, k;
|
|
|
|
rptr = regs + 0x80000 + (regno << 4);
|
|
j = *((volatile unsigned short *) rptr);
|
|
k = *((volatile unsigned short *) regs);
|
|
|
|
return (j & 0xffff) | ((k & 0xff00) << 8);
|
|
}
|
|
|
|
/* Set the palette */
|
|
static int maxinefb_setcolreg(unsigned regno, unsigned red, unsigned green,
|
|
unsigned blue, unsigned transp, struct fb_info *info)
|
|
{
|
|
/* value to be written into the palette reg. */
|
|
unsigned long hw_colorvalue = 0;
|
|
|
|
if (regno > 255)
|
|
return 1;
|
|
|
|
red >>= 8; /* The cmap fields are 16 bits */
|
|
green >>= 8; /* wide, but the harware colormap */
|
|
blue >>= 8; /* registers are only 8 bits wide */
|
|
|
|
hw_colorvalue = (blue << 16) + (green << 8) + (red);
|
|
|
|
maxinefb_ims332_write_register(IMS332_REG_COLOR_PALETTE + regno,
|
|
hw_colorvalue);
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops maxinefb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_setcolreg = maxinefb_setcolreg,
|
|
.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
};
|
|
|
|
int __init maxinefb_init(void)
|
|
{
|
|
unsigned long fboff;
|
|
unsigned long fb_start;
|
|
int i;
|
|
|
|
if (fb_get_options("maxinefb", NULL))
|
|
return -ENODEV;
|
|
|
|
/* Validate we're on the proper machine type */
|
|
if (mips_machtype != MACH_DS5000_XX) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
printk(KERN_INFO "Maxinefb: Personal DECstation detected\n");
|
|
printk(KERN_INFO "Maxinefb: initializing onboard framebuffer\n");
|
|
|
|
/* Framebuffer display memory base address */
|
|
fb_start = DS5000_xx_ONBOARD_FBMEM_START;
|
|
|
|
/* Clear screen */
|
|
for (fboff = fb_start; fboff < fb_start + 0x1ffff; fboff++)
|
|
*(volatile unsigned char *)fboff = 0x0;
|
|
|
|
maxinefb_fix.smem_start = fb_start;
|
|
|
|
/* erase hardware cursor */
|
|
for (i = 0; i < 512; i++) {
|
|
maxinefb_ims332_write_register(IMS332_REG_CURSOR_RAM + i,
|
|
0);
|
|
/*
|
|
if (i&0x8 == 0)
|
|
maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0x0f);
|
|
else
|
|
maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0xf0);
|
|
*/
|
|
}
|
|
|
|
fb_info.fbops = &maxinefb_ops;
|
|
fb_info.screen_base = (char *)maxinefb_fix.smem_start;
|
|
fb_info.var = maxinefb_defined;
|
|
fb_info.fix = maxinefb_fix;
|
|
fb_info.flags = FBINFO_DEFAULT;
|
|
|
|
fb_alloc_cmap(&fb_info.cmap, 256, 0);
|
|
|
|
if (register_framebuffer(&fb_info) < 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit maxinefb_exit(void)
|
|
{
|
|
unregister_framebuffer(&fb_info);
|
|
}
|
|
|
|
#ifdef MODULE
|
|
MODULE_LICENSE("GPL");
|
|
#endif
|
|
module_init(maxinefb_init);
|
|
module_exit(maxinefb_exit);
|
|
|