Hi all,
I'm struggling with the grammar necessary to find struct definitions
missing an initializer.
The background is that many tty interfaces include a method/operations
table (named fields of function ptrs). For example, given a declaration
like,
struct tty_operations {
int (*install)( /* ... */ );
int (*remove)( /* ... */ );
void (*cleanup)( /* ... * );
...
};
a tty driver might define its method table like,
static const struct tty_operations ops = {
.install = uart_install,
.remove = uart_remove,
.cleanup = uart_cleanup,
...
};
(actually, this is a common pattern throughout the kernel)
Many operations are optional; a NULL method is simply not executed.
For example,
if (tty->ops->cleanup)
tty->ops->cleanup(tty);
So trying to find those in-tree drivers which _do not_ define a cleanup
method with coccinelle, led to this fragment which has a parse error.
Apologies if my question is obvious or trivial; I'm still learning
coccinelle.
Regards,
Peter Hurley
--- >% ---
virtual context
@ depends on context @
identifier fops;
identifier fn;
@@
* struct tty_operations fops = {
... when != .cleanup = fn,
...
};
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