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Haavard Skinnemoen 325d6f5593 avr32: Fix OCD refcounting bug ... Iff the parent has TIF_DEBUG set, _and_ clone_flags includes CLONE_PTRACE we should set the TIF_DEBUG flag for the child and increment the ocd refcount. Otherwise, the TIF_DEBUG flag must be unset. Currently, the child inherits TIF_DEBUG from the parent before copy_thread is called, so TIF_DEBUG may be already be set before we determine whether the child is supposed to inherit debugging capabilities from the parent or not. This means that ocd_enable() won't increment the refcount, because TIF_DEBUG is already set, and that TIF_DEBUG will be set for processes that aren't being debugged. This leads to a refcounting asymmetry, which may show up as ------------[ cut here ]------------ Badness at arch/avr32/kernel/ocd.c:73 PC is at ocd_disable+0x34/0x60 LR is at put_lock_stats+0xa/0x20 as reported by David Brownell. Happens when strace'ing a process that forks a new child process, e.g. "strace mount -tjffs2 mtd1 /mnt", and subsequently killing the child process (e.g. "umount /mnt".) Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>		17 years ago
..
Makefile	[AVR32] NMI debugging	17 years ago
asm-offsets.c	[AVR32] Follow the rules when dealing with the OCD system	17 years ago
avr32_ksyms.c	[AVR32] Export clear_page symbol	18 years ago
cpu.c	[AVR32] constify function pointer tables	17 years ago
entry-avr32b.S	[AVR32] Fix wrong pt_regs in critical exception handler	17 years ago
head.S	AVR32: Get rid of board_early_init	19 years ago
init_task.c	…
irq.c	[AVR32] NMI debugging	17 years ago
kprobes.c	[AVR32] Enable debugging only when needed	17 years ago
module.c	[AVR32] Clean up exception handling code	18 years ago
nmi_debug.c	[AVR32] NMI debugging	17 years ago
ocd.c	libfs: allow error return from simple attributes	17 years ago
process.c	avr32: Fix OCD refcounting bug	17 years ago
ptrace.c	[AVR32] Enable debugging only when needed	17 years ago
semaphore.c	…
setup.c	Introduce flags for reserve_bootmem()	17 years ago
signal.c	[AVR32] Remove redundant try_to_freeze() call from do_signal()	17 years ago
stacktrace.c	[AVR32] Implement stacktrace support	17 years ago
switch_to.S	…
sys_avr32.c	[PATCH] AVR32: Implement kernel_execve	19 years ago
syscall-stubs.S	AVR32: Wire up sys_epoll_pwait	19 years ago
syscall_table.S	Fix timerfd breakage on avr32	17 years ago
time.c	Driver core: change sysdev classes to use dynamic kobject names	17 years ago
traps.c	[AVR32] NMI debugging	17 years ago
vmlinux.lds.S	all archs: consolidate init and exit sections in vmlinux.lds.h	17 years ago