Mark with notrace functions in core code that should not be
traced. The notrace attribute will prevent gcc from adding
a call to mcount on the annotated funtions.
Signed-off-by: Arnaldo Carvalho de Melo [EMAIL PROTECTED]
Signed-off-by: Steven Rostedt [EMAIL PROTECTED]
---
This adds the task comm and pid to the trace output. This gives the
output like:
CPU 0: sshd:2605 [80251858] remove_wait_queue+0xc/0x4a --
[802ad7be] free_poll_entry+0x1e/0x2a
CPU 2: bash:2610 [8038c3aa] tty_check_change+0x9/0xb6 --
[8038d295]
If CONFIG_MCOUNT is selected and /proc/sys/kernel/mcount_enabled is set to a
non-zero value the mcount routine will be called everytime we enter a kernel
function that is not marked with the notrace attribute.
The mcount routine will then call a registered function if a function
happens to be
MCOUNT will disable the regparm parameters of the i386 compile
options. When doing so, this breaks the prototype of do_IRQ
where the fastcall must be explicitly called.
Also fixed some whitespace damage in the call to do_IRQ.
Signed-off-by: Steven Rostedt [EMAIL PROTECTED]
---
Add the notrace annotations to some of the vsyscall functions.
Note: checkpatch errors on the define of vsyscall_fn because it thinks
that it is a complex macro that needs paranthesis. Unfortunately
we can't put paranthesis on this macro.
Signed-off-by: Steven Rostedt [EMAIL PROTECTED]
---
The trace output is very verbose with outputing both the
IP address (Instruction Pointer not Internet Protocol!)
and the kallsyms symbol. So if kallsyms is configured into
the kernel, another file is created in the debugfs system.
This is the trace_symonly file that leaves out the IP address.
