mem_init_done (was: Re: [PATCH] [POWERPC] Limit range of __init_ref_ok somewhat)

On Tue, 2 Oct 2007, Stephen Rothwell wrote:

+void * __init_refok zalloc_maybe_bootmem(size_t size, gfp_t mask)
+{
+	void *p;
+
+	if (mem_init_done)
+		p = kzalloc(size, mask);
+	else {
+		p = alloc_bootmem(size);
+		if (p)
+			memset(p, 0, size);
+	}
+	return p;
+}

BTW, is this `mem_init_done' flag the recommended(TM) way to handle this?
Or is it just something that always stayed under the radar of the reviewers, as
only PPC has it (and Atari)?

I remember we had something similar globally when __init was introduced,
which was used by the frame buffer code to determine whether to draw the
penguin logo (which is __initdata) or not. This code had to be ripped out (and
was replaced by the FBINFO_MODULE logic), because people didn't like
mem_init_done flags...

With kind regards,
 
Geert Uytterhoeven
Software Architect

Sony Network and Software Technology Center Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium
 
Phone:    +32 (0)2 700 8453	
Fax:      +32 (0)2 700 8622	
E-mail:   Geert.Uytterhoeven@sonycom.com	
Internet: http://www.sony-europe.com/
 	
Sony Network and Software Technology Center Europe	
A division of Sony Service Centre (Europe) N.V.	
Registered office: Technologielaan 7 · B-1840 Londerzeel · Belgium	
VAT BE 0413.825.160 · RPR Brussels	
Fortis Bank Zaventem · Swift GEBABEBB08A · IBAN BE39001382358619