Subject: Re: [PATCH 2/6] ehea: pHYP interface

From: Nathan Lynch <[email-masked]>
Date: Fri, 11 Aug 2006 16:19:15 -0500

Hi-

Jan-Bernd Themann wrote:
> +static inline long ehea_hcall_9arg_9ret(unsigned long opcode,
> +					unsigned long arg1,
> +					unsigned long arg2,
> +					unsigned long arg3,
> +					unsigned long arg4,
> +					unsigned long arg5,
> +					unsigned long arg6,
> +					unsigned long arg7,
> +					unsigned long arg8,
> +					unsigned long arg9,
> +					unsigned long *out1,
> +					unsigned long *out2,
> +					unsigned long *out3,
> +					unsigned long *out4,
> +					unsigned long *out5,
> +					unsigned long *out6,
> +					unsigned long *out7,
> +					unsigned long *out8,
> +					unsigned long *out9)
> +{
> +	long hret = H_SUCCESS;
> +	int i, sleep_msecs;
> +
> +	EDEB_EN(7, "opcode=%lx arg1=%lx arg2=%lx arg3=%lx arg4=%lx "
> +		"arg5=%lx arg6=%lx arg7=%lx arg8=%lx arg9=%lx",
> +		opcode, arg1, arg2, arg3, arg4, arg5, arg6, arg7,
> +		arg8, arg9);
> +
> +
> +	for (i = 0; i < 5; i++) {
> +		hret = plpar_hcall_9arg_9ret(opcode,
> +					    arg1, arg2, arg3, arg4,
> +					    arg5, arg6, arg7, arg8,
> +					    arg9,
> +					    out1, out2, out3, out4,
> +					    out5, out6, out7, out8,
> +					    out9);
> +
> +		if (H_IS_LONG_BUSY(hret)) {
> +			sleep_msecs = get_longbusy_msecs(hret);
> +			msleep_interruptible(sleep_msecs);
> +			continue;
> +		}

Looping five times before giving up seems arbitrary and failure-prone
on busy systems.

Is msleep_interruptible (as opposed to msleep) really appropriate?

Hope all the callers of this function are in non-atomic context (but I
wasn't able to find any callers?).

And this function is too big to be inline.