3f1934bc1a
Fix the two section mismatch warnings below. This fixes two real bugs since the code which has __exit annotations may already be gone when it is called. WARNING: vmlinux.o(.init.text+0x1cc4a): Section mismatch in reference from the function init_QDIO() to the function .exit.text:qdio_setup_exit() The function __init init_QDIO() references a function __exit qdio_setup_exit(). This is often seen when error handling in the init function uses functionality in the exit path. The fix is often to remove the __exit annotation of qdio_setup_exit() so it may be used outside an exit section. WARNING: vmlinux.o(.init.text+0x1cc7a): Section mismatch in reference from the function init_QDIO() to the function .exit.text:qdio_remove_perf_stats() The function __init init_QDIO() references a function __exit qdio_remove_perf_stats(). This is often seen when error handling in the init function uses functionality in the exit path. The fix is often to remove the __exit annotation of qdio_remove_perf_stats() so it may be used outside an exit section. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
151 lines
4.4 KiB
C
151 lines
4.4 KiB
C
/*
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* drivers/s390/cio/qdio_perf.c
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*
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* Copyright IBM Corp. 2008
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*
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* Author: Jan Glauber (jang@linux.vnet.ibm.com)
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*/
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#include <linux/kernel.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <asm/ccwdev.h>
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#include "cio.h"
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#include "css.h"
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#include "device.h"
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#include "ioasm.h"
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#include "chsc.h"
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#include "qdio_debug.h"
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#include "qdio_perf.h"
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int qdio_performance_stats;
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struct qdio_perf_stats perf_stats;
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#ifdef CONFIG_PROC_FS
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static struct proc_dir_entry *qdio_perf_pde;
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#endif
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inline void qdio_perf_stat_inc(atomic_long_t *count)
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{
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if (qdio_performance_stats)
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atomic_long_inc(count);
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}
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inline void qdio_perf_stat_dec(atomic_long_t *count)
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{
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if (qdio_performance_stats)
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atomic_long_dec(count);
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}
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/*
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* procfs functions
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*/
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static int qdio_perf_proc_show(struct seq_file *m, void *v)
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{
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seq_printf(m, "Number of qdio interrupts\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.qdio_int));
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seq_printf(m, "Number of PCI interrupts\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.pci_int));
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seq_printf(m, "Number of adapter interrupts\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.thin_int));
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seq_printf(m, "\n");
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seq_printf(m, "Inbound tasklet runs\t\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.tasklet_inbound));
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seq_printf(m, "Outbound tasklet runs\t\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.tasklet_outbound));
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seq_printf(m, "Adapter interrupt tasklet runs/loops\t\t: %li/%li\n",
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(long)atomic_long_read(&perf_stats.tasklet_thinint),
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(long)atomic_long_read(&perf_stats.tasklet_thinint_loop));
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seq_printf(m, "Adapter interrupt inbound tasklet runs/loops\t: %li/%li\n",
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(long)atomic_long_read(&perf_stats.thinint_inbound),
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(long)atomic_long_read(&perf_stats.thinint_inbound_loop));
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seq_printf(m, "\n");
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seq_printf(m, "Number of SIGA In issued\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.siga_in));
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seq_printf(m, "Number of SIGA Out issued\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.siga_out));
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seq_printf(m, "Number of SIGA Sync issued\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.siga_sync));
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seq_printf(m, "\n");
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seq_printf(m, "Number of inbound transfers\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.inbound_handler));
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seq_printf(m, "Number of outbound transfers\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.outbound_handler));
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seq_printf(m, "\n");
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seq_printf(m, "Number of fast requeues (outg. SBAL w/o SIGA)\t: %li\n",
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(long)atomic_long_read(&perf_stats.fast_requeue));
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seq_printf(m, "Number of outbound tasklet mod_timer calls\t: %li\n",
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(long)atomic_long_read(&perf_stats.debug_tl_out_timer));
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seq_printf(m, "Number of stop polling calls\t\t\t: %li\n",
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(long)atomic_long_read(&perf_stats.debug_stop_polling));
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seq_printf(m, "AI inbound tasklet loops after stop polling\t: %li\n",
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(long)atomic_long_read(&perf_stats.thinint_inbound_loop2));
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seq_printf(m, "\n");
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return 0;
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}
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static int qdio_perf_seq_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, qdio_perf_proc_show, NULL);
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}
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static struct file_operations qdio_perf_proc_fops = {
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.owner = THIS_MODULE,
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.open = qdio_perf_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/*
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* sysfs functions
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*/
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static ssize_t qdio_perf_stats_show(struct bus_type *bus, char *buf)
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{
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return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
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}
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static ssize_t qdio_perf_stats_store(struct bus_type *bus,
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const char *buf, size_t count)
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{
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unsigned long i;
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if (strict_strtoul(buf, 16, &i) != 0)
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return -EINVAL;
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if ((i != 0) && (i != 1))
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return -EINVAL;
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if (i == qdio_performance_stats)
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return count;
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qdio_performance_stats = i;
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/* reset performance statistics */
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if (i == 0)
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memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
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return count;
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}
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static BUS_ATTR(qdio_performance_stats, 0644, qdio_perf_stats_show,
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qdio_perf_stats_store);
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int __init qdio_setup_perf_stats(void)
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{
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int rc;
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rc = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
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if (rc)
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return rc;
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#ifdef CONFIG_PROC_FS
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memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
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qdio_perf_pde = proc_create("qdio_perf", S_IFREG | S_IRUGO,
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NULL, &qdio_perf_proc_fops);
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#endif
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return 0;
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}
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void qdio_remove_perf_stats(void)
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{
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#ifdef CONFIG_PROC_FS
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remove_proc_entry("qdio_perf", NULL);
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#endif
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bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
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}
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