user/sven/linux.git/kernel/extable.c, branch v3.7.8

extable: Skip sorting if sorted at build time.

2012-04-19T22:06:55Z

If the build program sortextable has already sorted the exception table, don't sort it again. Signed-off-by: David Daney Link: http://lkml.kernel.org/r/1334872799-14589-3-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin

extable, core_kernel_data(): Make sure all archs define _sdata

2011-05-20T06:56:56Z

A new utility function (core_kernel_data()) is used to determine if a passed in address is part of core kernel data or not. It may or may not return true for RO data, but this utility must work for RW data. Thus both _sdata and _edata must be defined and continuous, without .init sections that may later be freed and replaced by volatile memory (memory that can be freed). This utility function is used to determine if data is safe from ever being freed. Thus it should return true for all RW global data that is not in a module or has been allocated, or false otherwise. Also change core_kernel_data() back to the more precise _sdata condition and document the function. Signed-off-by: Steven Rostedt Acked-by: Ralf Baechle Acked-by: Hirokazu Takata Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Geert Uytterhoeven Cc: Roman Zippel Cc: linux-m68k@lists.linux-m68k.org Cc: Kyle McMartin Cc: Helge Deller Cc: JamesE.J.Bottomley Link: http://lkml.kernel.org/r/1305855298.1465.19.camel@gandalf.stny.rr.com Signed-off-by: Ingo Molnar ---- arch/alpha/kernel/vmlinux.lds.S | 1 + arch/m32r/kernel/vmlinux.lds.S | 1 + arch/m68k/kernel/vmlinux-std.lds | 2 ++ arch/m68k/kernel/vmlinux-sun3.lds | 1 + arch/mips/kernel/vmlinux.lds.S | 1 + arch/parisc/kernel/vmlinux.lds.S | 3 +++ kernel/extable.c | 12 +++++++++++- 7 files changed, 20 insertions(+), 1 deletion(-)

core_kernel_data(): Fix architectures that do not define _sdata

2011-05-19T23:27:16Z

Some architectures such as Alpha do not define _sdata but _data: kernel/built-in.o: In function `core_kernel_data': kernel/extable.c:77: undefined reference to `_sdata' So expand the scope of the data range to the text addresses too, this might be more correct anyway because this way we can cover readonly variables as well. Cc: Paul E. McKenney Cc: Steven Rostedt Link: http://lkml.kernel.org/n/tip-i878c8a0e0g0ep4v7i6vxnhz@git.kernel.org Signed-off-by: Ingo Molnar

ftrace: Allow dynamically allocated function tracers

2011-05-18T19:29:51Z

Now that functions may be selected individually, it only makes sense that we should allow dynamically allocated trace structures to be traced. This will allow perf to allocate a ftrace_ops structure at runtime and use it to pick and choose which functions that structure will trace. Note, a dynamically allocated ftrace_ops will always be called indirectly instead of being called directly from the mcount in entry.S. This is because there's no safe way to prevent mcount from being preempted before calling the function, unless we modify every entry.S to do so (not likely). Thus, dynamically allocated functions will now be called by the ftrace_ops_list_func() that loops through the ops that are allocated if there are more than one op allocated at a time. This loop is protected with a preempt_disable. To determine if an ftrace_ops structure is allocated or not, a new util function was added to the kernel/extable.c called core_kernel_data(), which returns 1 if the address is between _sdata and _edata. Cc: Paul E. McKenney Signed-off-by: Steven Rostedt

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

2009-04-05T18:04:19Z

* 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (413 commits) tracing, net: fix net tree and tracing tree merge interaction tracing, powerpc: fix powerpc tree and tracing tree interaction ring-buffer: do not remove reader page from list on ring buffer free function-graph: allow unregistering twice trace: make argument 'mem' of trace_seq_putmem() const tracing: add missing 'extern' keywords to trace_output.h tracing: provide trace_seq_reserve() blktrace: print out BLK_TN_MESSAGE properly blktrace: extract duplidate code blktrace: fix memory leak when freeing struct blk_io_trace blktrace: fix blk_probes_ref chaos blktrace: make classic output more classic blktrace: fix off-by-one bug blktrace: fix the original blktrace blktrace: fix a race when creating blk_tree_root in debugfs blktrace: fix timestamp in binary output tracing, Text Edit Lock: cleanup tracing: filter fix for TRACE_EVENT_FORMAT events ftrace: Using FTRACE_WARN_ON() to check "freed record" in ftrace_release() x86: kretprobe-booster interrupt emulation code fix ... Fix up trivial conflicts in arch/parisc/include/asm/ftrace.h include/linux/memory.h kernel/extable.c kernel/module.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-module-and-param

2009-04-05T17:30:21Z

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-module-and-param: module: use strstarts() strstarts: helper function for !strncmp(str, prefix, strlen(prefix)) arm: allow usage of string functions in linux/string.h module: don't use stop_machine on module load module: create a request_module_nowait() module: include other structures in module version check module: remove the SHF_ALLOC flag on the __versions section. module: clarify the force-loading taint message. module: Export symbols needed for Ksplice Ksplice: Add functions for walking kallsyms symbols module: remove module_text_address() module: __module_address module: Make find_symbol return a struct kernel_symbol kernel/module.c: fix an unused goto label param: fix charp parameters set via sysfs Fix trivial conflicts in kernel/extable.c manually.

module: remove module_text_address()

2009-03-31T02:35:32Z

Impact: Replace and remove risky (non-EXPORTed) API module_text_address() returns a pointer to the module, which given locking improvements in module.c, is useless except to test for NULL: 1) If the module can't go away, use __module_text_address. 2) Otherwise, just use is_module_text_address(). Cc: linux-mtd@lists.infradead.org Signed-off-by: Rusty Russell

tracing, Text Edit Lock: Fix one sparse warning in kernel/extable.c

2009-03-22T17:16:20Z

Impact: cleanup. The global mutex text_mutex if declared in linux/memory.h, so this file needs to be included into kernel/extable.c, where the same mutex is defined. This fixes the following sparse warning: kernel/extable.c:32:1: warning: symbol 'text_mutex' was not declared. Should it be static? Signed-off-by: Dmitri Vorobiev LKML-Reference: <1237741871-5827-3-git-send-email-dmitri.vorobiev@movial.com> Signed-off-by: Ingo Molnar

tracing, Text Edit Lock - kprobes architecture independent support, nommu fix

2009-03-20T10:09:27Z

Impact: build fix on SH !CONFIG_MMU Stephen Rothwell reported this linux-next build failure on the SH architecture: kernel/built-in.o: In function `disable_all_kprobes': kernel/kprobes.c:1382: undefined reference to `text_mutex' [...] And observed: | Introduced by commit 4460fdad85becd569f11501ad5b91814814335ff ("tracing, | Text Edit Lock - kprobes architecture independent support") from the | tracing tree. text_mutex is defined in mm/memory.c which is only built | if CONFIG_MMU is defined, which is not true for sh allmodconfig. Move this lock to kernel/extable.c (which is already home to various kernel text related routines), which file is always built-in. Reported-by: Stephen Rothwell Cc: Paul Mundt Cc: Mathieu Desnoyers LKML-Reference: <20090320110602.86351a91.sfr@canb.auug.org.au> Signed-off-by: Ingo Molnar

symbols, stacktrace: look up init symbols after module symbols

2009-03-19T12:38:35Z

Impact: fix incomplete stacktraces I noticed such weird stacktrace entries in lockdep dumps: [ 0.285956] {HARDIRQ-ON-W} state was registered at: [ 0.285956] [] mark_irqflags+0xbe/0x125 [ 0.285956] [] __lock_acquire+0x674/0x82d [ 0.285956] [] lock_acquire+0xfc/0x128 [ 0.285956] [] rt_spin_lock+0xc8/0xd0 [ 0.285956] [] 0xffffffffffffffff The stacktrace entry is cut off after rt_spin_lock. After much debugging i found out that stacktrace entries that belong to init symbols dont get printed out, due to commit: a2da405: module: Don't report discarded init pages as kernel text. The reason is this check added to core_kernel_text(): - if (addr >= (unsigned long)_sinittext && + if (system_state == SYSTEM_BOOTING && + addr >= (unsigned long)_sinittext && addr <= (unsigned long)_einittext) return 1; This will discard inittext symbols even though their symbol table is still present and even though stacktraces done while the system was booting up might still be relevant. To not reintroduce the (not well-specified) bug addressed in that commit, first do a module symbols lookup, then a final init-symbols lookup. This will work fine on architectures that have separate address spaces for modules (such as x86) - and should not crash any other architectures either. Acked-by: Peter Zijlstra Cc: Rusty Russell LKML-Reference: Signed-off-by: Ingo Molnar