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![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>
397 lines
8 KiB
C
397 lines
8 KiB
C
/*
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* Sealevel Systems 4021 driver.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* (c) Copyright 1999, 2001 Alan Cox
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* (c) Copyright 2001 Red Hat Inc.
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* Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/net.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/delay.h>
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#include <linux/hdlc.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <net/arp.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/byteorder.h>
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#include "z85230.h"
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struct slvl_device
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{
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struct z8530_channel *chan;
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int channel;
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};
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struct slvl_board
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{
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struct slvl_device dev[2];
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struct z8530_dev board;
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int iobase;
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};
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/*
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* Network driver support routines
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*/
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static inline struct slvl_device* dev_to_chan(struct net_device *dev)
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{
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return (struct slvl_device *)dev_to_hdlc(dev)->priv;
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}
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/*
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* Frame receive. Simple for our card as we do HDLC and there
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* is no funny garbage involved
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*/
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static void sealevel_input(struct z8530_channel *c, struct sk_buff *skb)
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{
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/* Drop the CRC - it's not a good idea to try and negotiate it ;) */
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skb_trim(skb, skb->len - 2);
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skb->protocol = hdlc_type_trans(skb, c->netdevice);
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skb_reset_mac_header(skb);
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skb->dev = c->netdevice;
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netif_rx(skb);
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}
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/*
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* We've been placed in the UP state
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*/
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static int sealevel_open(struct net_device *d)
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{
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struct slvl_device *slvl = dev_to_chan(d);
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int err = -1;
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int unit = slvl->channel;
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/*
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* Link layer up.
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*/
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switch (unit) {
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case 0:
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err = z8530_sync_dma_open(d, slvl->chan);
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break;
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case 1:
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err = z8530_sync_open(d, slvl->chan);
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break;
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}
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if (err)
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return err;
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err = hdlc_open(d);
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if (err) {
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switch (unit) {
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case 0:
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z8530_sync_dma_close(d, slvl->chan);
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break;
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case 1:
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z8530_sync_close(d, slvl->chan);
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break;
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}
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return err;
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}
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slvl->chan->rx_function = sealevel_input;
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/*
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* Go go go
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*/
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netif_start_queue(d);
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return 0;
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}
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static int sealevel_close(struct net_device *d)
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{
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struct slvl_device *slvl = dev_to_chan(d);
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int unit = slvl->channel;
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/*
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* Discard new frames
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*/
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slvl->chan->rx_function = z8530_null_rx;
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hdlc_close(d);
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netif_stop_queue(d);
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switch (unit) {
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case 0:
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z8530_sync_dma_close(d, slvl->chan);
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break;
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case 1:
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z8530_sync_close(d, slvl->chan);
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break;
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}
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return 0;
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}
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static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
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{
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/* struct slvl_device *slvl=dev_to_chan(d);
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z8530_ioctl(d,&slvl->sync.chanA,ifr,cmd) */
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return hdlc_ioctl(d, ifr, cmd);
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}
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/*
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* Passed network frames, fire them downwind.
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*/
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static netdev_tx_t sealevel_queue_xmit(struct sk_buff *skb,
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struct net_device *d)
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{
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return z8530_queue_xmit(dev_to_chan(d)->chan, skb);
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}
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static int sealevel_attach(struct net_device *dev, unsigned short encoding,
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unsigned short parity)
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{
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if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
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return 0;
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return -EINVAL;
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}
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static const struct net_device_ops sealevel_ops = {
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.ndo_open = sealevel_open,
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.ndo_stop = sealevel_close,
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.ndo_change_mtu = hdlc_change_mtu,
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.ndo_start_xmit = hdlc_start_xmit,
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.ndo_do_ioctl = sealevel_ioctl,
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};
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static int slvl_setup(struct slvl_device *sv, int iobase, int irq)
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{
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struct net_device *dev = alloc_hdlcdev(sv);
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if (!dev)
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return -1;
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dev_to_hdlc(dev)->attach = sealevel_attach;
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dev_to_hdlc(dev)->xmit = sealevel_queue_xmit;
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dev->netdev_ops = &sealevel_ops;
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dev->base_addr = iobase;
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dev->irq = irq;
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if (register_hdlc_device(dev)) {
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printk(KERN_ERR "sealevel: unable to register HDLC device\n");
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free_netdev(dev);
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return -1;
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}
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sv->chan->netdevice = dev;
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return 0;
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}
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/*
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* Allocate and setup Sealevel board.
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*/
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static __init struct slvl_board *slvl_init(int iobase, int irq,
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int txdma, int rxdma, int slow)
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{
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struct z8530_dev *dev;
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struct slvl_board *b;
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/*
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* Get the needed I/O space
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*/
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if (!request_region(iobase, 8, "Sealevel 4021")) {
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printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n",
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iobase);
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return NULL;
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}
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b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL);
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if (!b)
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goto err_kzalloc;
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b->dev[0].chan = &b->board.chanA;
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b->dev[0].channel = 0;
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b->dev[1].chan = &b->board.chanB;
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b->dev[1].channel = 1;
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dev = &b->board;
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/*
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* Stuff in the I/O addressing
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*/
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dev->active = 0;
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b->iobase = iobase;
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/*
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* Select 8530 delays for the old board
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*/
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if (slow)
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iobase |= Z8530_PORT_SLEEP;
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dev->chanA.ctrlio = iobase + 1;
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dev->chanA.dataio = iobase;
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dev->chanB.ctrlio = iobase + 3;
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dev->chanB.dataio = iobase + 2;
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dev->chanA.irqs = &z8530_nop;
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dev->chanB.irqs = &z8530_nop;
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/*
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* Assert DTR enable DMA
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*/
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outb(3 | (1 << 7), b->iobase + 4);
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/* We want a fast IRQ for this device. Actually we'd like an even faster
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IRQ ;) - This is one driver RtLinux is made for */
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if (request_irq(irq, z8530_interrupt, IRQF_DISABLED,
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"SeaLevel", dev) < 0) {
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printk(KERN_WARNING "sealevel: IRQ %d already in use.\n", irq);
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goto err_request_irq;
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}
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dev->irq = irq;
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dev->chanA.private = &b->dev[0];
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dev->chanB.private = &b->dev[1];
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dev->chanA.dev = dev;
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dev->chanB.dev = dev;
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dev->chanA.txdma = 3;
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dev->chanA.rxdma = 1;
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if (request_dma(dev->chanA.txdma, "SeaLevel (TX)"))
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goto err_dma_tx;
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if (request_dma(dev->chanA.rxdma, "SeaLevel (RX)"))
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goto err_dma_rx;
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disable_irq(irq);
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/*
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* Begin normal initialise
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*/
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if (z8530_init(dev) != 0) {
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printk(KERN_ERR "Z8530 series device not found.\n");
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enable_irq(irq);
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goto free_hw;
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}
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if (dev->type == Z85C30) {
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z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
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z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
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} else {
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z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
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z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
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}
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/*
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* Now we can take the IRQ
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*/
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enable_irq(irq);
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if (slvl_setup(&b->dev[0], iobase, irq))
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goto free_hw;
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if (slvl_setup(&b->dev[1], iobase, irq))
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goto free_netdev0;
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z8530_describe(dev, "I/O", iobase);
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dev->active = 1;
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return b;
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free_netdev0:
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unregister_hdlc_device(b->dev[0].chan->netdevice);
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free_netdev(b->dev[0].chan->netdevice);
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free_hw:
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free_dma(dev->chanA.rxdma);
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err_dma_rx:
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free_dma(dev->chanA.txdma);
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err_dma_tx:
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free_irq(irq, dev);
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err_request_irq:
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kfree(b);
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err_kzalloc:
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release_region(iobase, 8);
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return NULL;
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}
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static void __exit slvl_shutdown(struct slvl_board *b)
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{
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int u;
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z8530_shutdown(&b->board);
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for (u = 0; u < 2; u++) {
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struct net_device *d = b->dev[u].chan->netdevice;
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unregister_hdlc_device(d);
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free_netdev(d);
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}
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free_irq(b->board.irq, &b->board);
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free_dma(b->board.chanA.rxdma);
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free_dma(b->board.chanA.txdma);
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/* DMA off on the card, drop DTR */
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outb(0, b->iobase);
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release_region(b->iobase, 8);
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kfree(b);
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}
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static int io=0x238;
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static int txdma=1;
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static int rxdma=3;
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static int irq=5;
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static int slow=0;
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module_param(io, int, 0);
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MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
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module_param(txdma, int, 0);
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MODULE_PARM_DESC(txdma, "Transmit DMA channel");
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module_param(rxdma, int, 0);
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MODULE_PARM_DESC(rxdma, "Receive DMA channel");
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module_param(irq, int, 0);
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MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
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module_param(slow, bool, 0);
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MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");
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MODULE_AUTHOR("Alan Cox");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");
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static struct slvl_board *slvl_unit;
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static int __init slvl_init_module(void)
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{
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slvl_unit = slvl_init(io, irq, txdma, rxdma, slow);
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return slvl_unit ? 0 : -ENODEV;
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}
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static void __exit slvl_cleanup_module(void)
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{
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if (slvl_unit)
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slvl_shutdown(slvl_unit);
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}
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module_init(slvl_init_module);
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module_exit(slvl_cleanup_module);
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