On powerpc, setting CONFIG_NVRAM=n builds a kernel with no NVRAM support. Setting CONFIG_NVRAM=m enables the /dev/nvram misc device module without enabling NVRAM support in drivers. Setting CONFIG_NVRAM=y enables the misc device (built-in) and also enables NVRAM support in drivers. m68k shares the valkyriefb driver with powerpc, and since that driver uses NVRAM, it is affected by CONFIG_ATARI_SCSI, because of the use of "select NVRAM". Adopt the powerpc convention on m68k to avoid surprises. Signed-off-by: Finn Thain Tested-by: Christian T. Steigies --- This patch temporarily disables CONFIG_NVRAM on Atari, to prevent build failures when bisecting the rest of this patch series. It gets enabled again with the introduction of CONFIG_HAVE_ARCH_NVRAM_OPS, once the nvram_* global functions have been moved to an ops struct. The removal of "select NVRAM" may mean that some kernel configs (such as Debian/m68k) may need tweaking. --- drivers/char/Kconfig | 5 +---- drivers/scsi/Kconfig | 6 +++--- drivers/scsi/atari_scsi.c | 8 ++++---- 3 files changed, 8 insertions(+), 11 deletions(-) Index: linux/drivers/char/Kconfig =================================================================== --- linux.orig/drivers/char/Kconfig 2015-07-25 17:42:34.000000000 +1000 +++ linux/drivers/char/Kconfig 2015-07-25 17:45:24.000000000 +1000 @@ -247,7 +247,7 @@ source "drivers/char/hw_random/Kconfig" config NVRAM tristate "/dev/nvram support" - depends on ATARI || X86 || (ARM && RTC_DRV_CMOS) || GENERIC_NVRAM + depends on X86 || (ARM && RTC_DRV_CMOS) || GENERIC_NVRAM ---help--- If you say Y here and create a character special file /dev/nvram with major number 10 and minor number 144 using mknod ("man mknod"), @@ -265,9 +265,6 @@ config NVRAM should NEVER idly tamper with it. See Ralf Brown's interrupt list for a guide to the use of CMOS bytes by your BIOS. - On Atari machines, /dev/nvram is always configured and does not need - to be selected. - To compile this driver as a module, choose M here: the module will be called nvram. Index: linux/drivers/scsi/Kconfig =================================================================== --- linux.orig/drivers/scsi/Kconfig 2015-07-25 17:42:34.000000000 +1000 +++ linux/drivers/scsi/Kconfig 2015-07-25 17:45:24.000000000 +1000 @@ -1609,14 +1609,14 @@ config ATARI_SCSI tristate "Atari native SCSI support" depends on ATARI && SCSI select SCSI_SPI_ATTRS - select NVRAM ---help--- If you have an Atari with built-in NCR5380 SCSI controller (TT, Falcon, ...) say Y to get it supported. Of course also, if you have a compatible SCSI controller (e.g. for Medusa). - To compile this driver as a module, choose M here: the - module will be called atari_scsi. + To compile this driver as a module, choose M here: the module will + be called atari_scsi. If you also enable NVRAM support, the SCSI + host's ID is taken from the setting in TT RTC NVRAM. This driver supports both styles of NCR integration into the system: the TT style (separate DMA), and the Falcon style (via Index: linux/drivers/scsi/atari_scsi.c =================================================================== --- linux.orig/drivers/scsi/atari_scsi.c 2015-07-25 17:42:34.000000000 +1000 +++ linux/drivers/scsi/atari_scsi.c 2015-07-25 17:45:24.000000000 +1000 @@ -875,9 +875,10 @@ static int __init atari_scsi_probe(struc if (ATARIHW_PRESENT(TT_SCSI) && setup_sg_tablesize >= 0) atari_scsi_template.sg_tablesize = setup_sg_tablesize; - if (setup_hostid >= 0) { + if (setup_hostid >= 0) atari_scsi_template.this_id = setup_hostid & 7; - } else { +#ifdef CONFIG_NVRAM + else /* Test if a host id is set in the NVRam */ if (ATARIHW_PRESENT(TT_CLK) && nvram_check_checksum()) { unsigned char b = nvram_read_byte(14); @@ -888,8 +889,7 @@ static int __init atari_scsi_probe(struc if (b & 0x80) atari_scsi_template.this_id = b & 7; } - } - +#endif #ifdef REAL_DMA /* If running on a Falcon and if there's TT-Ram (i.e., more than one -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/