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Reviewed and applied spl-00-rm-gpl-symbol-notifier_chain.patch

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from Ricardo which removes a dependency on the GPL-only symbol
needed for a panic time notifier.  This funcationality was never
used and this improves our portability.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@159 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo 2008-11-03 19:53:23 +00:00
parent e73187714d
commit d50bd9e221
3 changed files with 35 additions and 103 deletions
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22
autoconf/spl-build.m4
View File

@ -328,27 +328,6 @@ AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
])
])
dnl #
dnl # 2.6.19 API change,
dnl # panic_notifier_list use atomic_notifier operations
dnl #
AC_DEFUN([SPL_AC_ATOMIC_PANIC_NOTIFIER],
[AC_MSG_CHECKING([whether panic_notifier_list is atomic])
SPL_LINUX_TRY_COMPILE([
#include <linux/notifier.h>
#include <linux/kernel.h>
],[
struct atomic_notifier_head panic_notifier_list;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_ATOMIC_PANIC_NOTIFIER, 1,
[panic_notifier_list is atomic])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.20 API change,
dnl # INIT_WORK use 2 args and not store data inside
@ -359,7 +338,6 @@ AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
#include <linux/workqueue.h>
],[
struct work_struct work;
INIT_WORK(&work, NULL, NULL);
],[
AC_MSG_RESULT(yes)

1
configure.ac
View File

@ -44,7 +44,6 @@ SPL_AC_DEBUG_MUTEX
SPL_AC_DEBUG_KSTAT
SPL_AC_DEBUG_CALLB
SPL_AC_TYPE_UINTPTR_T
SPL_AC_ATOMIC_PANIC_NOTIFIER
SPL_AC_3ARGS_INIT_WORK
SPL_AC_2ARGS_REGISTER_SYSCTL
SPL_AC_SET_SHRINKER

45
modules/spl/spl-debug.c
View File

@ -40,7 +40,6 @@
#include <linux/kthread.h>
#include <linux/hardirq.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <sys/sysmacros.h>
#include <sys/proc.h>
#include <sys/debug.h>
@ -108,7 +107,6 @@ char *trace_console_buffers[NR_CPUS][3];
struct rw_semaphore trace_sem;
atomic_t trace_tage_allocated = ATOMIC_INIT(0);
static int panic_notifier(struct notifier_block *, unsigned long, void *);
static int spl_debug_dump_all_pages(dumplog_priv_t *dp, char *);
static void trace_fini(void);
@ -120,12 +118,6 @@ static unsigned int pages_factor[TCD_TYPE_MAX] = {
10 /* 10% pages for TCD_TYPE_IRQ */
};
static struct notifier_block spl_panic_notifier = {
notifier_call: panic_notifier,
next: NULL,
priority: 10000
};
const char *
spl_debug_subsys2str(int subsys)
{
@ -1167,26 +1159,6 @@ spl_debug_mark_buffer(char *text)
}
EXPORT_SYMBOL(spl_debug_mark_buffer);
static int
panic_notifier(struct notifier_block *self,
unsigned long unused1, void *unused2)
{
if (spl_panic_in_progress)
return 0;
spl_panic_in_progress = 1;
mb();
if (!in_interrupt()) {
while (current->lock_depth >= 0)
unlock_kernel();
spl_debug_dumplog(DL_NOTHREAD | DL_SINGLE_CPU);
}
return 0;
}
static int
trace_init(int max_pages)
{
@ -1255,13 +1227,6 @@ debug_init(void)
if (rc)
return rc;
#ifdef HAVE_ATOMIC_PANIC_NOTIFIER
atomic_notifier_chain_register(&panic_notifier_list,
&spl_panic_notifier);
#else
notifier_chain_register(&panic_notifier_list,
&spl_panic_notifier);
#endif
return rc;
}
@ -1311,15 +1276,5 @@ trace_fini(void)
void
debug_fini(void)
{
#ifdef HAVE_ATOMIC_PANIC_NOTIFIER
atomic_notifier_chain_unregister(&panic_notifier_list,
&spl_panic_notifier);
#else
notifier_chain_unregister(&panic_notifier_list,
&spl_panic_notifier);
#endif
trace_fini();
return;
}