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Merge branch 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (131 commits)
  tracing/fastboot: improve help text
  tracing/stacktrace: improve help text
  tracing/fastboot: fix initcalls disposition in bootgraph.pl
  tracing/fastboot: fix bootgraph.pl initcall name regexp
  tracing/fastboot: fix issues and improve output of bootgraph.pl
  tracepoints: synchronize unregister static inline
  tracepoints: tracepoint_synchronize_unregister()
  ftrace: make ftrace_test_p6nop disassembler-friendly
  markers: fix synchronize marker unregister static inline
  tracing/fastboot: add better resolution to initcall debug/tracing
  trace: add build-time check to avoid overrunning hex buffer
  ftrace: fix hex output mode of ftrace
  tracing/fastboot: fix initcalls disposition in bootgraph.pl
  tracing/fastboot: fix printk format typo in boot tracer
  ftrace: return an error when setting a nonexistent tracer
  ftrace: make some tracers reentrant
  ring-buffer: make reentrant
  ring-buffer: move page indexes into page headers
  tracing/fastboot: only trace non-module initcalls
  ftrace: move pc counter in irqtrace
  ...

Manually fix conflicts:
 - init/main.c: initcall tracing
 - kernel/module.c: verbose level vs tracepoints
 - scripts/bootgraph.pl: fallout from cherry-picking commits.
This commit is contained in:
Linus Torvalds 2008-10-20 13:35:07 -07:00
commit 92b29b86fe
65 changed files with 6137 additions and 1614 deletions
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81
kernel/module.c
View file

@ -46,6 +46,8 @@
#include <asm/cacheflush.h>
#include <linux/license.h>
#include <asm/sections.h>
#include <linux/tracepoint.h>
#include <linux/ftrace.h>
#if 0
#define DEBUGP printk
@ -1430,6 +1432,9 @@ static void free_module(struct module *mod)
/* Module unload stuff */
module_unload_free(mod);
/* release any pointers to mcount in this module */
ftrace_release(mod->module_core, mod->core_size);
/* This may be NULL, but that's OK */
module_free(mod, mod->module_init);
kfree(mod->args);
@ -1861,9 +1866,13 @@ static noinline struct module *load_module(void __user *umod,
unsigned int markersindex;
unsigned int markersstringsindex;
unsigned int verboseindex;
unsigned int tracepointsindex;
unsigned int tracepointsstringsindex;
unsigned int mcountindex;
struct module *mod;
long err = 0;
void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
void *mseg;
struct exception_table_entry *extable;
mm_segment_t old_fs;
@ -2156,6 +2165,12 @@ static noinline struct module *load_module(void __user *umod,
markersstringsindex = find_sec(hdr, sechdrs, secstrings,
"__markers_strings");
verboseindex = find_sec(hdr, sechdrs, secstrings, "__verbose");
tracepointsindex = find_sec(hdr, sechdrs, secstrings, "__tracepoints");
tracepointsstringsindex = find_sec(hdr, sechdrs, secstrings,
"__tracepoints_strings");
mcountindex = find_sec(hdr, sechdrs, secstrings,
"__mcount_loc");
/* Now do relocations. */
for (i = 1; i < hdr->e_shnum; i++) {
@ -2183,6 +2198,12 @@ static noinline struct module *load_module(void __user *umod,
mod->num_markers =
sechdrs[markersindex].sh_size / sizeof(*mod->markers);
#endif
#ifdef CONFIG_TRACEPOINTS
mod->tracepoints = (void *)sechdrs[tracepointsindex].sh_addr;
mod->num_tracepoints =
sechdrs[tracepointsindex].sh_size / sizeof(*mod->tracepoints);
#endif
/* Find duplicate symbols */
err = verify_export_symbols(mod);
@ -2201,12 +2222,22 @@ static noinline struct module *load_module(void __user *umod,
add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);
if (!mod->taints) {
#ifdef CONFIG_MARKERS
if (!mod->taints)
marker_update_probe_range(mod->markers,
mod->markers + mod->num_markers);
#endif
dynamic_printk_setup(sechdrs, verboseindex);
#ifdef CONFIG_TRACEPOINTS
tracepoint_update_probe_range(mod->tracepoints,
mod->tracepoints + mod->num_tracepoints);
#endif
}
/* sechdrs[0].sh_size is always zero */
mseg = (void *)sechdrs[mcountindex].sh_addr;
ftrace_init_module(mseg, mseg + sechdrs[mcountindex].sh_size);
err = module_finalize(hdr, sechdrs, mod);
if (err < 0)
goto cleanup;
@ -2276,6 +2307,7 @@ static noinline struct module *load_module(void __user *umod,
cleanup:
kobject_del(&mod->mkobj.kobj);
kobject_put(&mod->mkobj.kobj);
ftrace_release(mod->module_core, mod->core_size);
free_unload:
module_unload_free(mod);
module_free(mod, mod->module_init);
@ -2759,3 +2791,50 @@ void module_update_markers(void)
mutex_unlock(&module_mutex);
}
#endif
#ifdef CONFIG_TRACEPOINTS
void module_update_tracepoints(void)
{
struct module *mod;
mutex_lock(&module_mutex);
list_for_each_entry(mod, &modules, list)
if (!mod->taints)
tracepoint_update_probe_range(mod->tracepoints,
mod->tracepoints + mod->num_tracepoints);
mutex_unlock(&module_mutex);
}
/*
* Returns 0 if current not found.
* Returns 1 if current found.
*/
int module_get_iter_tracepoints(struct tracepoint_iter *iter)
{
struct module *iter_mod;
int found = 0;
mutex_lock(&module_mutex);
list_for_each_entry(iter_mod, &modules, list) {
if (!iter_mod->taints) {
/*
* Sorted module list
*/
if (iter_mod < iter->module)
continue;
else if (iter_mod > iter->module)
iter->tracepoint = NULL;
found = tracepoint_get_iter_range(&iter->tracepoint,
iter_mod->tracepoints,
iter_mod->tracepoints
+ iter_mod->num_tracepoints);
if (found) {
iter->module = iter_mod;
break;
}
}
}
mutex_unlock(&module_mutex);
return found;
}
#endif