11 Aug, 2009
1 commit
-
Conflicts:
kernel/trace/trace_events_filter.cWe use the tracing/core version.
Signed-off-by: Ingo Molnar
31 Jul, 2009
1 commit
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Use kernel_text_address() for checking probe address instead of
__kernel_text_address(), because __kernel_text_address() returns true
for init functions even after relaseing those functions.That will hit a BUG() in text_poke().
Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Signed-off-by: Linus Torvalds
01 Jul, 2009
2 commits
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Use struct list instead of struct hlist for managing
insn_pages, because insn_pages doesn't use hash table.Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Ananth N Mavinakayanahalli
LKML-Reference:
Signed-off-by: Ingo Molnar -
Remove needless kprobe_insn_mutex unlocking during safety check
in garbage collection, because if someone releases a dirty slot
during safety check (which ensures other cpus doesn't execute
all dirty slots), the safety check must be fail. So, we need to
hold the mutex while checking safety.Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Ananth N Mavinakayanahalli
LKML-Reference:
Signed-off-by: Ingo Molnar
09 May, 2009
1 commit
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Fix kprobes to lock text_mutex around some arch_arm/disarm_kprobe() which
are newly added by commit de5bd88d5a5cce3cacea904d3503e5ebdb3852a2.Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Mathieu Desnoyers
Cc: Jim Keniston
Cc: Ingo Molnar
Signed-off-by: Linus Torvalds
07 Apr, 2009
4 commits
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Add disable_kprobe() and enable_kprobe() to disable/enable kprobes
temporarily.disable_kprobe() asynchronously disables probe handlers of specified
kprobe. So, after calling it, some handlers can be called at a while.
enable_kprobe() enables specified kprobe.aggr_pre_handler and aggr_post_handler check disabled probes. On the
other hand aggr_break_handler and aggr_fault_handler don't check it
because these handlers will be called while executing pre or post handlers
and usually those help error handling.Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Rename kprobe_enabled to kprobes_all_disarmed and invert logic due to
avoiding naming confusion from per-probe disabling.Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Clean up positions of EXPORT_SYMBOL_GPL in kernel/kprobes.c according to
checkpatch.pl.Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently, kprobes can disable all probes at once, but can't disable it
individually (not unregister, just disable an kprobe, because
unregistering needs to wait for scheduler synchronization). These patches
introduce APIs for on-the-fly per-probe disabling and re-enabling by
dis-arming/re-arming its breakpoint instruction.This patch:
Change old_p to ap in add_new_kprobe() for readability, copy flags member
in add_aggr_kprobe(), and simplify the code flow of
register_aggr_kprobe().Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Mar, 2009
1 commit
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Fix locking imbalance in kretprobes:
=====================================
[ BUG: bad unlock balance detected! ]
-------------------------------------
kthreadd/2 is trying to release lock (&rp->lock) at:
[] pre_handler_kretprobe+0xea/0xf4
but there are no more locks to release!other info that might help us debug this:
1 lock held by kthreadd/2:
#0: (rcu_read_lock){..--}, at: [] __atomic_notifier_call_chain+0x0/0x5astack backtrace:
Pid: 2, comm: kthreadd Not tainted 2.6.29-rc8 #1
Call Trace:
[] ? printk+0xf/0x17
[] ? pre_handler_kretprobe+0xea/0xf4
[] print_unlock_inbalance_bug+0xc3/0xce
[] ? clocksource_read+0x7/0xa
[] ? getnstimeofday+0x5f/0xf6
[] ? register_lock_class+0x17/0x293
[] ? mark_lock+0x1e/0x30b
[] ? tick_dev_program_event+0x4a/0xbc
[] ? __slab_alloc+0xa5/0x415
[] ? pre_handler_kretprobe+0x28/0xf4
[] ? pre_handler_kretprobe+0xea/0xf4
[] lock_release_non_nested+0xa4/0x1a5
[] ? pre_handler_kretprobe+0xea/0xf4
[] lock_release+0x141/0x166
[] _spin_unlock_irqrestore+0x19/0x50
[] pre_handler_kretprobe+0xea/0xf4
[] kprobe_exceptions_notify+0x1c9/0x43e
[] notifier_call_chain+0x26/0x48
[] __atomic_notifier_call_chain+0x37/0x5a
[] ? __atomic_notifier_call_chain+0x0/0x5a
[] atomic_notifier_call_chain+0xc/0xe
[] notify_die+0x2d/0x2f
[] do_int3+0x1f/0x71
[] int3+0x2c/0x34
[] ? do_fork+0x1/0x288
[] ? kernel_thread+0x71/0x79
[] ? kthread+0x0/0x60
[] ? kthread+0x0/0x60
[] ? kernel_thread_helper+0x0/0x10
[] kthreadd+0xac/0x148
[] ? kthreadd+0x0/0x148
[] kernel_thread_helper+0x7/0x10Signed-off-by: Ananth N Mavinakayanahalli
Tested-by: Bharata B Rao
Cc: Masami Hiramatsu
Cc: Jim Keniston
Cc: Linus Torvalds
Cc: Andrew Morton
Cc: [2.6.29.x, 2.6.28.x, 2.6.27.x]
LKML-Reference:
Signed-off-by: Ingo Molnar
06 Mar, 2009
1 commit
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Use the mutual exclusion provided by the text edit lock in the kprobes code. It
allows coherent manipulation of the kernel code by other subsystems.Changelog:
Move the kernel_text_lock/unlock out of the for loops.
Use text_mutex directly instead of a function.
Remove whitespace modifications.(note : kprobes_mutex is always taken outside of text_mutex)
Signed-off-by: Mathieu Desnoyers
Acked-by: Ananth N Mavinakayanahalli
Acked-by: Masami Hiramatsu
LKML-Reference:
Signed-off-by: Ingo Molnar
17 Jan, 2009
1 commit
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Check CONFIG_FREEZER instead of CONFIG_PM because kprobe booster
depends on freeze_processes() and thaw_processes() when CONFIG_PREEMPT=y.This fixes a linkage error which occurs when CONFIG_PREEMPT=y, CONFIG_PM=y
and CONFIG_FREEZER=n.Reported-by: Cheng Renquan
Signed-off-by: Masami Hiramatsu
Signed-off-by: Rafael J. Wysocki
Acked-by: Ingo Molnar
Signed-off-by: Len Brown
07 Jan, 2009
6 commits
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Allow kprobes to probe module __init routines. When __init functions are
freed, kprobes which probe those functions are set to "Gone" flag. These
"Gone" probes are disarmed from the code and never be enabled.Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove called_from argument from kprobes which had been used for
preventing self-refering of kernel module. However, since we don't keep
module's refcount after registering kprobe any more, there is no reason to
check that.This patch also simplifies registering/unregistering functions because we
don't need to use __builtin_return_address(0) which was passed to
called_from.[ananth@in.ibm.com: build fix]
Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Allows kprobes to probe __exit routine. This adds flags member to struct
kprobe. When module is freed(kprobes hooks module_notifier to get this
event), kprobes which probe the functions in that module are set to "Gone"
flag to the flags member. These "Gone" probes are never be enabled.
Users can check the GONE flag through debugfs.This also removes mod_refcounted, because we couldn't free a module if
kprobe incremented the refcount of that module.[akpm@linux-foundation.org: document some locking]
[mhiramat@redhat.com: bugfix: pass aggr_kprobe to arch_remove_kprobe]
[mhiramat@redhat.com: bugfix: release old_p's insn_slot before error return]
Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Masami Hiramatsu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add __kprobes to kprobes internal functions for protecting from probing by
kprobes itself.Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add kprobe_insn_mutex for protecting kprobe_insn_pages hlist, and remove
kprobe_mutex from architecture dependent code.This allows us to call arch_remove_kprobe() (and free_insn_slot) while
holding kprobe_mutex.Signed-off-by: Masami Hiramatsu
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: Russell King
Cc: "Luck, Tony"
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Ingo Molnar
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When someone called register_*probe() from kernel-core code(not from
module) and that probes a kernel module, users can remove the probed
module because kprobe doesn't increment reference counter of the module.
(on the other hand, if the kernel-module calls register_*probe, kprobe
increments refcount of the probed module.)Currently, we have no register_*probe() calling from kernel-core(except
smoke-test, but the smoke-test doesn't probe module), so there is no real
bugs. But the logic is wrong(or not fair) and it can causes a problem
when someone might want to probe module from kernel.After this patch is applied, even if someone put register_*probe() call in
the kernel-core code, it increments the reference counter of the probed
module, and it prevents user to remove the module until stopping probing
it.Signed-off-by: Masami Hiramatsu
Cc: Lai Jiangshan
Cc: Ananth N Mavinakayanahalli
Cc: Hiroshi Shimamoto
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Nov, 2008
2 commits
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We only need the cacheline padding on SMP kernels. Saves 6k:
text data bss dec hex filename
5713 388 8840 14941 3a5d kernel/kprobes.o
5713 388 2632 8733 221d kernel/kprobes.oAcked-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
__register_kprobe() can be preempted after checking probing address but
before module_text_address() or try_module_get(), and in this interval
the module can be unloaded. In that case, try_module_get(probed_mod)
will access to invalid address, or kprobe will probe invalid address.This patch uses preempt_disable() to protect it and uses
__module_text_address() and __kernel_text_address().Signed-off-by: Lai Jiangshan
Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Hiroshi Shimamoto
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2008
1 commit
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Make the needlessly global kretprobe_table_lock() static.
Signed-off-by: Adrian Bunk
Acked-by: Ananth N Mavinakayanahalli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jul, 2008
2 commits
-
I noticed that there's a CONFIG_KPROBES check inside kernel/kprobes.c,
which is redundant.Signed-off-by: Abhishek Sagar
Acked-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently list of kretprobe instances are stored in kretprobe object (as
used_instances,free_instances) and in kretprobe hash table. We have one
global kretprobe lock to serialise the access to these lists. This causes
only one kretprobe handler to execute at a time. Hence affects system
performance, particularly on SMP systems and when return probe is set on
lot of functions (like on all systemcalls).Solution proposed here gives fine-grain locks that performs better on SMP
system compared to present kretprobe implementation.Solution:
1) Instead of having one global lock to protect kretprobe instances
present in kretprobe object and kretprobe hash table. We will have
two locks, one lock for protecting kretprobe hash table and another
lock for kretporbe object.2) We hold lock present in kretprobe object while we modify kretprobe
instance in kretprobe object and we hold per-hash-list lock while
modifying kretprobe instances present in that hash list. To prevent
deadlock, we never grab a per-hash-list lock while holding a kretprobe
lock.3) We can remove used_instances from struct kretprobe, as we can
track used instances of kretprobe instances using kretprobe hash
table.Time duration for kernel compilation ("make -j 8") on a 8-way ppc64 system
with return probes set on all systemcalls looks like this.cacheline non-cacheline Un-patched kernel
aligned patch aligned patch
===============================================================================
real 9m46.784s 9m54.412s 10m2.450s
user 40m5.715s 40m7.142s 40m4.273s
sys 2m57.754s 2m58.583s 3m17.430s
===========================================================Time duration for kernel compilation ("make -j 8) on the same system, when
kernel is not probed.
=========================
real 9m26.389s
user 40m8.775s
sys 2m7.283s
=========================Signed-off-by: Srinivasa DS
Signed-off-by: Jim Keniston
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: David S. Miller
Cc: Masami Hiramatsu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Jul, 2008
1 commit
-
Signed-off-by: Daniel Guilak
Signed-off-by: Linus Torvalds
13 Jun, 2008
1 commit
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Fix error checking routine to catch an error which occurs in first
__register_*probe().Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: David Miller
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Apr, 2008
4 commits
-
Introduce unregister_/register_jprobes() for jprobe batch registration.
Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Prasanna S Panchamukhi
Cc: Shaohua Li
Cc: David Miller
Cc: "Frank Ch. Eigler"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce unregister_/register_kretprobes() for kretprobe batch registration.
Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Prasanna S Panchamukhi
Cc: Shaohua Li
Cc: David Miller
Cc: "Frank Ch. Eigler"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce unregister_/register_kprobes() for kprobe batch registration. This
can reduce waiting time for synchronized_sched() when a lot of probes have to
be unregistered at once.Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Prasanna S Panchamukhi
Cc: Shaohua Li
Cc: David Miller
Cc: "Frank Ch. Eigler"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Prohibit users from probing preempt_schedule(). One way of prohibiting the
user from probing functions is by marking such functions with __kprobes. But
this method doesn't work for those functions, which are already marked to
different section like preempt_schedule() (belongs to __sched section). So we
use blacklist approach to refuse user from probing these functions.In blacklist approach we populate the blacklisted function's starting address
and its size in kprobe_blacklist structure. Then we verify the user specified
address against start and end of the blacklisted function. So any attempt to
register probe on blacklisted functions will be rejected.[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Srinivasa DS
Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Jim Keniston
Cc: Dave Hansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Mar, 2008
2 commits
-
Fix a bug in regiseter_kretprobe() which does not check rp->kp.symbol_name ==
NULL before calling kprobe_lookup_name.For maintainability, this introduces kprobe_addr helper function which
resolves addr field. It is used by register_kprobe and register_kretprobe.Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add CONFIG_HAVE_KRETPROBES to the arch//Kconfig file for relevant
architectures with kprobes support. This facilitates easy handling of
in-kernel modules (like samples/kprobes/kretprobe_example.c) that depend on
kretprobes being present in the kernel.Thanks to Sam Ravnborg for helping make the patch more lean.
Per Mathieu's suggestion, added CONFIG_KRETPROBES and fixed up dependencies.
Signed-off-by: Ananth N Mavinakayanahalli
Acked-by: Mathieu Desnoyers
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Feb, 2008
1 commit
-
Provide support to add an optional user defined callback to be run at
function entry of a kretprobe'd function. Also modify the kprobe smoke
tests to include an entry-handler during the kretprobe sanity test.Signed-off-by: Abhishek Sagar
Cc: Prasanna S Panchamukhi
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Acked-by: Jim Keniston
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Jan, 2008
1 commit
-
Here is a quick and naive smoke test for kprobes. This is intended to
just verify if some unrelated change broke the *probes subsystem. It is
self contained, architecture agnostic and isn't of any great use by itself.This needs to be built in the kernel and runs a basic set of tests to
verify if kprobes, jprobes and kretprobes run fine on the kernel. In case
of an error, it'll print out a message with a "BUG" prefix.This is a start; we intend to add more tests to this bucket over time.
Thanks to Jim Keniston and Masami Hiramatsu for comments and suggestions.
Tested on x86 (32/64) and powerpc.
Signed-off-by: Ananth N Mavinakayanahalli
Acked-by: Masami Hiramatsu
Signed-off-by: Thomas Gleixner
Signed-off-by: Ingo Molnar
17 Oct, 2007
2 commits
-
Introduce architecture dependent kretprobe blacklists to prohibit users
from inserting return probes on the function in which kprobes can be
inserted but kretprobes can not.This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and
registers "__switch_to" to the blacklist on x86-64, because that mark is to
prohibit user from inserting only kretprobe.Signed-off-by: Masami Hiramatsu
Cc: Prasanna S Panchamukhi
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
x86(-64) are the last architectures still using the page fault notifier
cruft for the kprobes page fault hook. This patch converts them to the
proper direct calls, and removes the now unused pagefault notifier bits
aswell as the cruft in kprobes.c that was related to this mess.I know Andi didn't really like this, but all other architecture maintainers
agreed the direct calls are much better and besides the obvious cruft
removal a common way of dealing with kprobes across architectures is
important aswell.[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix sparc64]
Signed-off-by: Christoph Hellwig
Cc: Andi Kleen
Cc:
Cc: Prasanna S Panchamukhi
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Aug, 2007
1 commit
-
gcc-4.2 is a lot more picky about its symbol handling. EXPORT_SYMBOL no
longer works on symbols that are undefined or defined with static scope.For example, with CONFIG_PROFILE off, I see:
kernel/profile.c:206: error: __ksymtab_profile_event_unregister causes a section type conflict
kernel/profile.c:205: error: __ksymtab_profile_event_register causes a section type conflictThis patch moves the EXPORTs inside the #ifdef CONFIG_PROFILE, so we
only try to export symbols that are defined.Also, in kernel/kprobes.c there's an EXPORT_SYMBOL_GPL() for
jprobes_return, which if CONFIG_JPROBES is undefined is a static
inline and gives the same error.And in drivers/acpi/resources/rsxface.c, there's an
ACPI_EXPORT_SYMBOPL() for a static symbol. If it's static, it's not
accessible from outside the compilation unit, so should bot be exported.These three changes allow building a zx1_defconfig kernel with gcc 4.2
on IA64.[akpm@linux-foundation.org: export jpobe_return properly]
Signed-off-by: Peter Chubb
Cc: Prasanna S Panchamukhi
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: "Luck, Tony"
Cc: Len Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Jul, 2007
1 commit
-
I realise jprobes are a razor-blades-included type of interface, but that
doesn't mean we can't try and make them safer to use. This guy I know once
wrote code like this:struct jprobe jp = { .kp.symbol_name = "foo", .entry = "jprobe_foo" };
And then his kernel exploded. Oops.
This patch adds an arch hook, arch_deref_entry_point() (I don't like it
either) which takes the void * in a struct jprobe, and gives back the text
address that it represents.We can then use that in register_jprobe() to check that the entry point we're
passed is actually in the kernel text, rather than just some random value.Signed-off-by: Michael Ellerman
Cc: Prasanna S Panchamukhi
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 May, 2007
3 commits
-
This patch provides a debugfs knob to turn kprobes on/off
o A new file /debug/kprobes/enabled indicates if kprobes is enabled or
not (default enabled)
o Echoing 0 to this file will disarm all installed probes
o Any new probe registration when disabled will register the probe but
not arm it. A message will be printed out in such a case.
o When a value 1 is echoed to the file, all probes (including ones
registered in the intervening period) will be enabled
o Unregistration will happen irrespective of whether probes are globally
enabled or not.
o Update Documentation/kprobes.txt to reflect these changes. While there
also update the doc to make it current.We are also looking at providing sysrq key support to tie to the disabling
feature provided by this patch.[akpm@linux-foundation.org: Use bool like a bool!]
[akpm@linux-foundation.org: add printk facility levels]
[cornelia.huck@de.ibm.com: Add the missing arch_trampoline_kprobe() for s390]
Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Srinivasa DS
Signed-off-by: Cornelia Huck
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- consolidate duplicate code in all arch_prepare_kretprobe instances
into common code
- replace various odd helpers that use hlist_for_each_entry to get
the first elemenet of a list with either a hlist_for_each_entry_save
or an opencoded access to the first element in the caller
- inline add_rp_inst into it's only remaining caller
- use kretprobe_inst_table_head instead of opencoding itSigned-off-by: Christoph Hellwig
Cc: Prasanna S Panchamukhi
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove superflous braces and fix indentation aswell as comments.
Signed-off-by: Christoph Hellwig
Cc: Prasanna S Panchamukhi
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds