Warning at arch/arm/mach-omap2/clock.c:474 omap2_clk_switch_mpurate_at_boot

Using an image built from hwpack_linaro-omap3_20110526-1_armel_supported.tar.gz I saw the following in dmesg:

[ 0.871917] WARNING: at /build/buildd/linux-linaro-omap-2.6.38/arch/arm/mach-omap2/clock.c:474 omap2_clk_switch_mpurate_at_boot+0x77/0x90()
[ 0.884948] clock: dpll1_ck: unable to set MPU rate to 1000: -22
[ 0.891265] Modules linked in:
[ 0.894561] [<c005767d>] (unwind_backtrace+0x1/0x9c) from [<c00844cf>] (warn_slowpath_common+0x3f/0x4c)
[ 0.904388] [<c00844cf>] (warn_slowpath_common+0x3f/0x4c) from [<c0084535>] (warn_slowpath_fmt+0x1d/0x28)
[ 0.914367] [<c0084535>] (warn_slowpath_fmt+0x1d/0x28) from [<c0011e43>] (omap2_clk_switch_mpurate_at_boot+0x77/0x90)
[ 0.925445] [<c0011e43>] (omap2_clk_switch_mpurate_at_boot+0x77/0x90) from [<c0011f83>] (omap3xxx_clk_arch_init+0x1b/0x40)
[ 0.936981] [<c0011f83>] (omap3xxx_clk_arch_init+0x1b/0x40) from [<c004d4e1>] (do_one_initcall+0x25/0x118)
[ 0.947052] [<c004d4e1>] (do_one_initcall+0x25/0x118) from [<c0008abd>] (kernel_init+0xe5/0x154)
[ 0.956237] [<c0008abd>] (kernel_init+0xe5/0x154) from [<c0052ac5>] (kernel_thread_exit+0x1/0x8)
[ 0.965454] ---[ end trace da227214a82491b7 ]---