On Mon, 2008-02-11 at 17:24 +0100, Jan-Bernd Themann wrote: > Drivers like eHEA need memory notifiers in order to > update their internal DMA memory map when memory is added > to or removed from the system. > > Patch for eHEA memory hotplug support that uses these functions: > http://www.spinics.net/lists/netdev/msg54484.html
This driver is broken pretty horribly. It won't even compile for a plain ppc64 kernel: http://sr71.net/~dave/linux/ehea-is-broken.config I know it's used for very specific hardware, but this is the symptom of it not using the proper abstracted interfaces to the VM. In file included from /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_main.c:42: /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.h:44:14: warning: "SECTION_SIZE_BITS" is not defined /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.h:45:2: error: #error eHEA module cannot work if kernel sectionsize < ehea sectionsize CC drivers/net/mii.o make[4]: *** [drivers/net/ehea/ehea_main.o] Error 1 make[4]: *** Waiting for unfinished jobs.... CC drivers/net/ixgb/ixgb_param.o In file included from /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c:32: /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.h:44:14: warning: "SECTION_SIZE_BITS" is not defined /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.h:45:2: error: #error eHEA module cannot work if kernel sectionsize < ehea sectionsize /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c: In function 'ehea_create_busmap': /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c:574: error: 'NR_MEM_SECTIONS' undeclared (first use in this function) /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c:574: error: (Each undeclared identifier is reported only once /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c:574: error: for each function it appears in.) /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c:575: error: implicit declaration of function 'valid_section_nr' /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c: In function 'ehea_map_vaddr': /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c:606: error: 'SECTION_SIZE_BITS' undeclared (first use in this function) /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c: In function 'ehea_reg_kernel_mr': /home/dave/work/linux/2.6/23/linux-2.6.git/drivers/net/ehea/ehea_qmr.c:655: error: 'SECTION_SIZE_BITS' undeclared (first use in this function) -- Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/