pm24.git/kernel, branch v2.6.15-rc7

[PATCH] Fix memory ordering problem in wake_futex()

2005-12-24T20:13:27Z

Fix a memory ordering problem that occurs on IA64. The "store" to q->lock_ptr in wake_futex() can become visible before wake_up_all() clears the lock in the futex_q. Signed-off-by: Jack Steiner Acked-by: Ingo Molnar Signed-off-by: Linus Torvalds

[PATCH] kernel/params.c: fix sysfs access with CONFIG_MODULES=n

2005-12-20T18:31:33Z

All the work was done to setup the file and maintain the file handles but the access functions were zeroed out due to the #ifdef. Removing the #ifdef allows full access to all the parameters when CONFIG_MODULES=n. akpm: put it back again, but use CONFIG_SYSFS instead. Signed-off-by: Jason Wessel Signed-off-by: Andrew Morton Signed-off-by: Adrian Bunk Signed-off-by: Linus Torvalds

[PATCH] kprobes: increment kprobe missed count for multiprobes

2005-12-12T16:57:45Z

When multiple probes are registered at the same address and if due to some recursion (probe getting triggered within a probe handler), we skip calling pre_handlers and just increment nmissed field. The below patch make sure it walks the list for multiple probes case. Without the below patch we get incorrect results of nmissed count for multiple probe case. Signed-off-by: Anil S Keshavamurthy Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] kprobes: no probes on critical path

2005-12-12T16:57:45Z

For Kprobes critical path is the path from debug break exception handler till the control reaches kprobes exception code. No probes can be supported in this path as we will end up in recursion. This patch prevents this by moving the below function to safe __kprobes section onto which no probes can be inserted. Signed-off-by: Anil S Keshavamurthy Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Add try_to_freeze to kauditd

2005-12-12T16:57:43Z

kauditd was causing suspends to fail because it refused to freeze. Adding a try_to_freeze() to its sleep loop solves the issue. Signed-off-by: Pierre Ossman Acked-by: Pavel Machek Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] kprobes: fix race in aggregate kprobe registration

2005-12-12T16:57:43Z

When registering multiple kprobes at the same address, we leave a small window where the kprobe hlist will not contain a reference to the registered kprobe, leading to potentially, a system crash if the breakpoint is hit on another processor. Patch below now automically relpace the old kprobe with the new kprobe from the hash list. Signed-off-by: Anil S Keshavamurthy Acked-by: Ananth N Mavinakayanahalli Cc: "Paul E. McKenney" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Add getnstimestamp function

2005-12-12T16:57:42Z

There are several functions that might seem appropriate for a timestamp: get_cycles() current_kernel_time() do_gettimeofday() Each has problems with combinations of SMP-safety, low resolution, and monotonicity. This patch adds a new function that returns a monotonic SMP-safe timestamp with nanosecond resolution where available. Changes: Split timestamp into separate patch Moved to kernel/time.c Renamed to getnstimestamp Fixed unintended-pointer-arithmetic bug Signed-off-by: Matt Helsley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Fix RCU race in access of nohz_cpu_mask

2005-12-12T16:57:42Z

Accessing nohz_cpu_mask before incrementing rcp->cur is racy. It can cause tickless idle CPUs to be included in rsp->cpumask, which will extend graceperiods unnecessarily. Fix this race. It has been tested using extensions to RCU torture module that forces various CPUs to become idle. Signed-off-by: Srivatsa Vaddagiri Cc: Dipankar Sarma Cc: "Paul E. McKenney" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Fix bug in RCU torture test

2005-12-12T16:57:42Z

While doing some test of RCU torture module, I hit a OOPS in rcu_do_batch, which was trying to processes callback of a module that was just removed. This is because we weren't waiting long enough for all callbacks to fire. Signed-off-by: Srivatsa Vaddagiri Cc: Dipankar Sarma Acked-by: "Paul E. McKenney" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] add rcu_barrier() synchronization point

2005-12-12T16:57:42Z

This introduces a new interface - rcu_barrier() which waits until all the RCUs queued until this call have been completed. Reiser4 needs this, because we do more than just freeing memory object in our RCU callback: we also remove it from the list hanging off super-block. This means, that before freeing reiser4-specific portion of super-block (during umount) we have to wait until all pending RCU callbacks are executed. The only change of reiser4 made to the original patch, is exporting of rcu_barrier(). Cc: Hans Reiser Cc: Vladimir V. Saveliev Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds