When neither LANTIQ nor MIPS_MALTA is set, 'physical_memsize' is not declared. This causes the build to fail with: mips-linux-ld: arch/mips/kernel/vpe-mt.o: in function `vpe_run': arch/mips/kernel/vpe-mt.c:(.text.vpe_run+0x280): undefined reference to `physical_memsize' Fix this by declaring a 0-value physical_memsize with neither LANTIQ nor MIPS_MALTA is set, like LANTIQ does. Fixes: 1a2a6d7e8816 ("MIPS: APRP: Split VPE loader into separate files.") Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Reported-by: kernel test robot <lkp@xxxxxxxxx> Link: https://lore.kernel.org/all/202302030625.2g3E98sY-lkp@xxxxxxxxx/ Cc: Dengcheng Zhu <dzhu@xxxxxxxxxxxx> Cc: John Crispin <john@xxxxxxxxxxx> Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> Cc: linux-mips@xxxxxxxxxxxxxxx --- How has this build error not been detected for 10 years? arch/mips/kernel/vpe-mt.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff -- a/arch/mips/kernel/vpe-mt.c b/arch/mips/kernel/vpe-mt.c --- a/arch/mips/kernel/vpe-mt.c +++ b/arch/mips/kernel/vpe-mt.c @@ -22,6 +22,15 @@ static int major; /* The number of TCs and VPEs physically available on the core */ static int hw_tcs, hw_vpes; +#if !defined(CONFIG_MIPS_MALTA) && !defined(CONFIG_LANTIQ) +/* The 2 above provide their own 'physical_memsize' variable. */ +/* + * This is needed by the vpe-mt loader code, just set it to 0 and assume + * that the firmware hardcodes this value to something useful. + */ +unsigned long physical_memsize = 0L; +#endif + /* We are prepared so configure and start the VPE... */ int vpe_run(struct vpe *v) {