Revision f6771dbb27c704ce837ba3bb1dcaa53f48f76ea8 authored by Ralf Baechle on 08 November 2007, 18:02:29 UTC, committed by Ralf Baechle on 15 November 2007, 23:21:49 UTC
Shadow register support would not possibly have worked on multicore systems. The support code for it was also depending not on MIPS R2 but VSMP or SMTC kernels even though it makes perfect sense with UP kernels. SR sets are a scarce resource and the expected usage pattern is that users actually hardcode the register set numbers in their code. So fix the allocator by ditching it. Move the remaining CPU probe bits into the generic CPU probe. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 parent efb9ca0
bitmap.c
/*
* QNX4 file system, Linux implementation.
*
* Version : 0.2.1
*
* Using parts of the xiafs filesystem.
*
* History :
*
* 28-05-1998 by Richard Frowijn : first release.
* 20-06-1998 by Frank Denis : basic optimisations.
* 25-06-1998 by Frank Denis : qnx4_is_free, qnx4_set_bitmap, qnx4_bmap .
* 28-06-1998 by Frank Denis : qnx4_free_inode (to be fixed) .
*/
#include <linux/time.h>
#include <linux/fs.h>
#include <linux/qnx4_fs.h>
#include <linux/stat.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/bitops.h>
#if 0
int qnx4_new_block(struct super_block *sb)
{
return 0;
}
#endif /* 0 */
static void count_bits(register const char *bmPart, register int size,
int *const tf)
{
char b;
int tot = *tf;
if (size > QNX4_BLOCK_SIZE) {
size = QNX4_BLOCK_SIZE;
}
do {
b = *bmPart++;
if ((b & 1) == 0)
tot++;
if ((b & 2) == 0)
tot++;
if ((b & 4) == 0)
tot++;
if ((b & 8) == 0)
tot++;
if ((b & 16) == 0)
tot++;
if ((b & 32) == 0)
tot++;
if ((b & 64) == 0)
tot++;
if ((b & 128) == 0)
tot++;
size--;
} while (size != 0);
*tf = tot;
}
unsigned long qnx4_count_free_blocks(struct super_block *sb)
{
int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
int total = 0;
int total_free = 0;
int offset = 0;
int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
struct buffer_head *bh;
while (total < size) {
if ((bh = sb_bread(sb, start + offset)) == NULL) {
printk("qnx4: I/O error in counting free blocks\n");
break;
}
count_bits(bh->b_data, size - total, &total_free);
brelse(bh);
total += QNX4_BLOCK_SIZE;
offset++;
}
return total_free;
}
#ifdef CONFIG_QNX4FS_RW
int qnx4_is_free(struct super_block *sb, long block)
{
int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
struct buffer_head *bh;
const char *g;
int ret = -EIO;
start += block / (QNX4_BLOCK_SIZE * 8);
QNX4DEBUG(("qnx4: is_free requesting block [%lu], bitmap in block [%lu]\n",
(unsigned long) block, (unsigned long) start));
(void) size; /* CHECKME */
bh = sb_bread(sb, start);
if (bh == NULL) {
return -EIO;
}
g = bh->b_data + (block % QNX4_BLOCK_SIZE);
if (((*g) & (1 << (block % 8))) == 0) {
QNX4DEBUG(("qnx4: is_free -> block is free\n"));
ret = 1;
} else {
QNX4DEBUG(("qnx4: is_free -> block is busy\n"));
ret = 0;
}
brelse(bh);
return ret;
}
int qnx4_set_bitmap(struct super_block *sb, long block, int busy)
{
int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
struct buffer_head *bh;
char *g;
start += block / (QNX4_BLOCK_SIZE * 8);
QNX4DEBUG(("qnx4: set_bitmap requesting block [%lu], bitmap in block [%lu]\n",
(unsigned long) block, (unsigned long) start));
(void) size; /* CHECKME */
bh = sb_bread(sb, start);
if (bh == NULL) {
return -EIO;
}
g = bh->b_data + (block % QNX4_BLOCK_SIZE);
if (busy == 0) {
(*g) &= ~(1 << (block % 8));
} else {
(*g) |= (1 << (block % 8));
}
mark_buffer_dirty(bh);
brelse(bh);
return 0;
}
static void qnx4_clear_inode(struct inode *inode)
{
struct qnx4_inode_entry *qnx4_ino = qnx4_raw_inode(inode);
/* What for? */
memset(qnx4_ino->di_fname, 0, sizeof qnx4_ino->di_fname);
qnx4_ino->di_size = 0;
qnx4_ino->di_num_xtnts = 0;
qnx4_ino->di_mode = 0;
qnx4_ino->di_status = 0;
}
void qnx4_free_inode(struct inode *inode)
{
if (inode->i_ino < 1) {
printk("free_inode: inode 0 or nonexistent inode\n");
return;
}
qnx4_clear_inode(inode);
clear_inode(inode);
}
#endif
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