malta is broken on mainline. lmo contain a patch "[MIPS] SOCitSC support" (which looks okay but mainline has a different change, namely "[MIPS] MT: Reenable EIC support and add support for SOCit SC" which uses some defines without updating the header file. Are you aware of this problem? http://www.linux-mips.org/git?p=linux.git;a=commitdiff;h=d1d5c41425124d5fa4a1ce6a59e13c7da48279c6 vs http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d725cf3818b12a17d78b87a2de19e8eec17126ae The error I get is: CC arch/mips/mips-boards/malta/malta_int.o arch/mips/mips-boards/malta/malta_int.c: In function ‘arch_init_irq’: arch/mips/mips-boards/malta/malta_int.c:314: error: ‘mips_revision_sconid’ undeclared (first use in this function) arch/mips/mips-boards/malta/malta_int.c:314: error: (Each undeclared identifier is reported only once arch/mips/mips-boards/malta/malta_int.c:314: error: for each function it appears in.) arch/mips/mips-boards/malta/malta_int.c:315: error: ‘MIPS_REVISION_SCON_SOCIT’ undeclared (first use in this function) arch/mips/mips-boards/malta/malta_int.c:316: error: ‘MIPS_REVISION_SCON_ROCIT’ undeclared (first use in this function) arch/mips/mips-boards/malta/malta_int.c:323: error: ‘MIPS_REVISION_SCON_SOCITSC’ undeclared (first use in this function) arch/mips/mips-boards/malta/malta_int.c:324: error: ‘MIPS_REVISION_SCON_SOCITSCP’ undeclared (first use in this function) make[5]: *** [arch/mips/mips-boards/malta/malta_int.o] Error 1 -- Martin Michlmayr http://www.cyrius.com/