![Alexey Dobriyan](/assets/img/avatar_default.png)
Remove fs.h from mm.h. For this, 1) Uninline vma_wants_writenotify(). It's pretty huge anyway. 2) Add back fs.h or less bloated headers (err.h) to files that need it. As result, on x86_64 allyesconfig, fs.h dependencies cut down from 3929 files rebuilt down to 3444 (-12.3%). Cross-compile tested without regressions on my two usual configs and (sigh): alpha arm-mx1ads mips-bigsur powerpc-ebony alpha-allnoconfig arm-neponset mips-capcella powerpc-g5 alpha-defconfig arm-netwinder mips-cobalt powerpc-holly alpha-up arm-netx mips-db1000 powerpc-iseries arm arm-ns9xxx mips-db1100 powerpc-linkstation arm-assabet arm-omap_h2_1610 mips-db1200 powerpc-lite5200 arm-at91rm9200dk arm-onearm mips-db1500 powerpc-maple arm-at91rm9200ek arm-picotux200 mips-db1550 powerpc-mpc7448_hpc2 arm-at91sam9260ek arm-pleb mips-ddb5477 powerpc-mpc8272_ads arm-at91sam9261ek arm-pnx4008 mips-decstation powerpc-mpc8313_rdb arm-at91sam9263ek arm-pxa255-idp mips-e55 powerpc-mpc832x_mds arm-at91sam9rlek arm-realview mips-emma2rh powerpc-mpc832x_rdb arm-ateb9200 arm-realview-smp mips-excite powerpc-mpc834x_itx arm-badge4 arm-rpc mips-fulong powerpc-mpc834x_itxgp arm-carmeva arm-s3c2410 mips-ip22 powerpc-mpc834x_mds arm-cerfcube arm-shannon mips-ip27 powerpc-mpc836x_mds arm-clps7500 arm-shark mips-ip32 powerpc-mpc8540_ads arm-collie arm-simpad mips-jazz powerpc-mpc8544_ds arm-corgi arm-spitz mips-jmr3927 powerpc-mpc8560_ads arm-csb337 arm-trizeps4 mips-malta powerpc-mpc8568mds arm-csb637 arm-versatile mips-mipssim powerpc-mpc85xx_cds arm-ebsa110 i386 mips-mpc30x powerpc-mpc8641_hpcn arm-edb7211 i386-allnoconfig mips-msp71xx powerpc-mpc866_ads arm-em_x270 i386-defconfig mips-ocelot powerpc-mpc885_ads arm-ep93xx i386-up mips-pb1100 powerpc-pasemi arm-footbridge ia64 mips-pb1500 powerpc-pmac32 arm-fortunet ia64-allnoconfig mips-pb1550 powerpc-ppc64 arm-h3600 ia64-bigsur mips-pnx8550-jbs powerpc-prpmc2800 arm-h7201 ia64-defconfig mips-pnx8550-stb810 powerpc-ps3 arm-h7202 ia64-gensparse mips-qemu powerpc-pseries arm-hackkit ia64-sim mips-rbhma4200 powerpc-up arm-integrator ia64-sn2 mips-rbhma4500 s390 arm-iop13xx ia64-tiger mips-rm200 s390-allnoconfig arm-iop32x ia64-up mips-sb1250-swarm s390-defconfig arm-iop33x ia64-zx1 mips-sead s390-up arm-ixp2000 m68k mips-tb0219 sparc arm-ixp23xx m68k-amiga mips-tb0226 sparc-allnoconfig arm-ixp4xx m68k-apollo mips-tb0287 sparc-defconfig arm-jornada720 m68k-atari mips-workpad sparc-up arm-kafa m68k-bvme6000 mips-wrppmc sparc64 arm-kb9202 m68k-hp300 mips-yosemite sparc64-allnoconfig arm-ks8695 m68k-mac parisc sparc64-defconfig arm-lart m68k-mvme147 parisc-allnoconfig sparc64-up arm-lpd270 m68k-mvme16x parisc-defconfig um-x86_64 arm-lpd7a400 m68k-q40 parisc-up x86_64 arm-lpd7a404 m68k-sun3 powerpc x86_64-allnoconfig arm-lubbock m68k-sun3x powerpc-cell x86_64-defconfig arm-lusl7200 mips powerpc-celleb x86_64-up arm-mainstone mips-atlas powerpc-chrp32 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
145 lines
2.9 KiB
C
145 lines
2.9 KiB
C
/*
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* arch/um/drivers/mmapper_kern.c
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*
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* BRIEF MODULE DESCRIPTION
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*
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* Copyright (C) 2000 RidgeRun, Inc.
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* Author: RidgeRun, Inc.
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* Greg Lonnon glonnon@ridgerun.com or info@ridgerun.com
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <linux/miscdevice.h>
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#include <asm/uaccess.h>
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#include "mem_user.h"
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/* These are set in mmapper_init, which is called at boot time */
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static unsigned long mmapper_size;
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static unsigned long p_buf = 0;
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static char *v_buf = NULL;
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static ssize_t
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mmapper_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
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{
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return simple_read_from_buffer(buf, count, ppos, v_buf, mmapper_size);
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}
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static ssize_t
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mmapper_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
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{
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if (*ppos > mmapper_size)
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return -EINVAL;
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if (count > mmapper_size - *ppos)
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count = mmapper_size - *ppos;
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if (copy_from_user(&v_buf[*ppos], buf, count))
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return -EFAULT;
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return count;
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}
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static int
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mmapper_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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return(-ENOIOCTLCMD);
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}
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static int
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mmapper_mmap(struct file *file, struct vm_area_struct * vma)
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{
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int ret = -EINVAL;
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int size;
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if (vma->vm_pgoff != 0)
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goto out;
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size = vma->vm_end - vma->vm_start;
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if(size > mmapper_size) return(-EFAULT);
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/* XXX A comment above remap_pfn_range says it should only be
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* called when the mm semaphore is held
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*/
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if (remap_pfn_range(vma, vma->vm_start, p_buf >> PAGE_SHIFT, size,
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vma->vm_page_prot))
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goto out;
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ret = 0;
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out:
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return ret;
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}
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static int
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mmapper_open(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static int
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mmapper_release(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static const struct file_operations mmapper_fops = {
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.owner = THIS_MODULE,
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.read = mmapper_read,
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.write = mmapper_write,
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.ioctl = mmapper_ioctl,
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.mmap = mmapper_mmap,
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.open = mmapper_open,
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.release = mmapper_release,
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};
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/* No locking needed - only used (and modified) by below initcall and exitcall. */
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static struct miscdevice mmapper_dev = {
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.minor = MISC_DYNAMIC_MINOR,
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.name = "mmapper",
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.fops = &mmapper_fops
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};
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static int __init mmapper_init(void)
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{
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int err;
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printk(KERN_INFO "Mapper v0.1\n");
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v_buf = (char *) find_iomem("mmapper", &mmapper_size);
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if(mmapper_size == 0){
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printk(KERN_ERR "mmapper_init - find_iomem failed\n");
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goto out;
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}
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err = misc_register(&mmapper_dev);
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if(err){
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printk(KERN_ERR "mmapper - misc_register failed, err = %d\n",
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err);
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goto out;
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}
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p_buf = __pa(v_buf);
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out:
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return 0;
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}
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static void mmapper_exit(void)
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{
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misc_deregister(&mmapper_dev);
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}
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module_init(mmapper_init);
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module_exit(mmapper_exit);
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MODULE_AUTHOR("Greg Lonnon <glonnon@ridgerun.com>");
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MODULE_DESCRIPTION("DSPLinux simulator mmapper driver");
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/*
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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