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2015-01-06rcu: Make SRCU optional by using CONFIG_SRCUPranith Kumar1-0/+3
SRCU is not necessary to be compiled by default in all cases. For tinification efforts not compiling SRCU unless necessary is desirable. The current patch tries to make compiling SRCU optional by introducing a new Kconfig option CONFIG_SRCU which is selected when any of the components making use of SRCU are selected. If we do not select CONFIG_SRCU, srcu.o will not be compiled at all. text data bss dec hex filename 2007 0 0 2007 7d7 kernel/rcu/srcu.o Size of arch/powerpc/boot/zImage changes from text data bss dec hex filename 831552 64180 23944 919676 e087c arch/powerpc/boot/zImage : before 829504 64180 23952 917636 e0084 arch/powerpc/boot/zImage : after so the savings are about ~2000 bytes. Signed-off-by: Pranith Kumar <[email protected]> CC: Paul E. McKenney <[email protected]> CC: Josh Triplett <[email protected]> CC: Lai Jiangshan <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> [ paulmck: resolve conflict due to removal of arch/ia64/kvm/Kconfig. ]
2014-04-24kprobes, notifier: Use NOKPROBE_SYMBOL macro in notifierMasami Hiramatsu1-9/+13
Use NOKPROBE_SYMBOL macro to protect functions from kprobes instead of __kprobes annotation in notifier. Signed-off-by: Masami Hiramatsu <[email protected]> Reviewed-by: Steven Rostedt <[email protected]> Reviewed-by: Josh Triplett <[email protected]> Cc: Paul E. McKenney <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2014-02-26notifier: Substitute rcu_access_pointer() for rcu_dereference_raw()Paul E. McKenney1-1/+1
(Trivial patch.) If the code is looking at the RCU-protected pointer itself, but not dereferencing it, the rcu_dereference() functions can be downgraded to rcu_access_pointer(). This commit makes this downgrade in __blocking_notifier_call_chain() which simply compares the RCU-protected pointer against NULL with no dereferencing. Signed-off-by: Paul E. McKenney <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Linus Torvalds <[email protected]> Reviewed-by: Josh Triplett <[email protected]>
2011-10-31kernel: Map most files to use export.h instead of module.hPaul Gortmaker1-1/+1
The changed files were only including linux/module.h for the EXPORT_SYMBOL infrastructure, and nothing else. Revector them onto the isolated export header for faster compile times. Nothing to see here but a whole lot of instances of: -#include <linux/module.h> +#include <linux/export.h> This commit is only changing the kernel dir; next targets will probably be mm, fs, the arch dirs, etc. Signed-off-by: Paul Gortmaker <[email protected]>
2011-07-25notifiers: sys: move reboot notifiers into reboot.hAmerigo Wang1-31/+0
It is not necessary to share the same notifier.h. This patch already moves register_reboot_notifier() and unregister_reboot_notifier() from kernel/notifier.c to kernel/sys.c. [[email protected]: make allyesconfig succeed on ppc64] Signed-off-by: WANG Cong <[email protected]> Cc: David Miller <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Greg KH <[email protected]> Signed-off-by: WANG Cong <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2010-02-25sched: Use lockdep-based checking on rcu_dereference()Paul E. McKenney1-3/+3
Update the rcu_dereference() usages to take advantage of the new lockdep-based checking. Signed-off-by: Paul E. McKenney <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] LKML-Reference: <[email protected]> [ -v2: fix allmodconfig missing symbol export build failure on x86 ] Signed-off-by: Ingo Molnar <[email protected]>
2009-08-30kprobes: Fix to add __kprobes to notify_dieMasami Hiramatsu1-1/+1
Add __kprobes to notify_die() because do_int3() calls notify_die() instead of atomic_notify_call_chain() which is already marked as __kprobes. Signed-off-by: Masami Hiramatsu <[email protected]> Acked-by: Ananth N Mavinakayanahalli <[email protected]> Cc: Ingo Molnar <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2008-11-24Merge branches 'core/debug', 'core/futexes', 'core/locking', 'core/rcu', ↵Ingo Molnar1-0/+8
'core/signal', 'core/urgent' and 'core/xen' into core/core
2008-10-14ftrace: ignore functions that cannot be kprobe-edIngo Molnar1-1/+1
kprobes already has an extensive list of annotations for functions that should not be instrumented. Add notrace annotations to these functions as well. This is particularly useful for functions called by the NMI path. Signed-off-by: Ingo Molnar <[email protected]>
2008-09-10debug: add notifier chain debugging, v2Arjan van de Ven1-9/+1
- unbreak ia64 (and powerpc) where function pointers dont point at code but at data (reported by Tony Luck) [ [email protected]: various cleanups ] Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2008-09-10debug: add notifier chain debuggingArjan van de Ven1-0/+16
during some development we suspected a case where we left something in a notifier chain that was from a module that was unloaded already... and that sort of thing is rather hard to track down. This patch adds a very simple sanity check (which isn't all that expensive) to make sure the notifier we're about to call is actually from either the kernel itself of from a still-loaded module, avoiding a hard-to-chase-down crash. Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2008-04-29ipc: re-enable msgmni automatic recomputing msgmni if set to negativeNadia Derbey1-0/+38
The enhancement as asked for by Yasunori: if msgmni is set to a negative value, register it back into the ipcns notifier chain. A new interface has been added to the notification mechanism: notifier_chain_cond_register() registers a notifier block only if not already registered. With that new interface we avoid taking care of the states changes in procfs. Signed-off-by: Nadia Derbey <[email protected]> Cc: Yasunori Goto <[email protected]> Cc: Matt Helsley <[email protected]> Cc: Mingming Cao <[email protected]> Cc: Pierre Peiffer <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-02-06kernel/notifier.c should #include <linux/reboot.h>Adrian Bunk1-0/+1
Every file should include the headers containing the prototypes for its global functions (in this case {,un}register_reboot_notifier()). Signed-off-by: Adrian Bunk <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-19Add kernel/notifier.cAlexey Dobriyan1-0/+539
There is separate notifier header, but no separate notifier .c file. Extract notifier code out of kernel/sys.c which will remain for misc syscalls I hope. Merge kernel/die_notifier.c into kernel/notifier.c. [[email protected]: coding-style fixes] Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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