Geert,

Am 26.01.2016 um 12:00 schrieb Geert Uytterhoeven:

Hi Richard,

On Mon, Jan 25, 2016 at 11:24 PM, Richard Weinberger [off-list ref] wrote:

quoted

Not every arch has io memory nor can this driver ever work
on UML/i386.
So, unbreak the build by fixing the dependencies.

Signed-off-by: Richard Weinberger <richard@nod.at>
---
 drivers/mtd/nand/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 545d82b..b253654 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig

@@ -311,6 +311,7 @@ config MTD_NAND_CAFE
 config MTD_NAND_CS553X
        tristate "NAND support for CS5535/CS5536 (AMD Geode companion chip)"
        depends on X86_32
+       depends on !UML && HAS_IOMEM

I don't think there's a need for the !UML dependency?
Hence just "depends on X86_32 && HAS_IOMEM"?

Strictly speaking this would work as HAS_IOMEM implies !UML.
The build error shows that it fails also because UML/i386 is x86_32
but lacks some x86_32 stuff:

drivers/mtd/nand/cs553x_nand.c: In function ‘cs553x_init_one’:
drivers/mtd/nand/cs553x_nand.c:212:2: error: implicit declaration of function ‘ioremap’ [-Werror=implicit-function-declaration]
  this->IO_ADDR_R = this->IO_ADDR_W = ioremap(adr, 4096);
  ^
drivers/mtd/nand/cs553x_nand.c:212:36: warning: assignment makes pointer from integer without a cast [enabled by default]
  this->IO_ADDR_R = this->IO_ADDR_W = ioremap(adr, 4096);
                                    ^
drivers/mtd/nand/cs553x_nand.c:256:2: error: implicit declaration of function ‘iounmap’ [-Werror=implicit-function-declaration]
  iounmap(this->IO_ADDR_R);
  ^
drivers/mtd/nand/cs553x_nand.c: In function ‘is_geode’:
drivers/mtd/nand/cs553x_nand.c:266:19: error: ‘struct cpuinfo_um’ has no member named ‘x86_vendor’
  if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
                   ^
drivers/mtd/nand/cs553x_nand.c:266:34: error: ‘X86_VENDOR_AMD’ undeclared (first use in this function)
  if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
                                  ^
drivers/mtd/nand/cs553x_nand.c:266:34: note: each undeclared identifier is reported only once for each function it appears in
drivers/mtd/nand/cs553x_nand.c:267:19: error: ‘struct cpuinfo_um’ has no member named ‘x86’
      boot_cpu_data.x86 == 5 &&
                   ^
drivers/mtd/nand/cs553x_nand.c:268:19: error: ‘struct cpuinfo_um’ has no member named ‘x86_model’
      boot_cpu_data.x86_model == 10)
                   ^
drivers/mtd/nand/cs553x_nand.c:271:20: error: ‘struct cpuinfo_um’ has no member named ‘x86_vendor’
  if ((boot_cpu_data.x86_vendor == X86_VENDOR_NSC ||
                    ^
drivers/mtd/nand/cs553x_nand.c:271:35: error: ‘X86_VENDOR_NSC’ undeclared (first use in this function)
  if ((boot_cpu_data.x86_vendor == X86_VENDOR_NSC ||
                                   ^
drivers/mtd/nand/cs553x_nand.c:272:20: error: ‘struct cpuinfo_um’ has no member named ‘x86_vendor’
       boot_cpu_data.x86_vendor == X86_VENDOR_CYRIX) &&
                    ^
drivers/mtd/nand/cs553x_nand.c:272:35: error: ‘X86_VENDOR_CYRIX’ undeclared (first use in this function)
       boot_cpu_data.x86_vendor == X86_VENDOR_CYRIX) &&
                                   ^
drivers/mtd/nand/cs553x_nand.c:273:19: error: ‘struct cpuinfo_um’ has no member named ‘x86’
      boot_cpu_data.x86 == 5 &&
                   ^
drivers/mtd/nand/cs553x_nand.c:274:19: error: ‘struct cpuinfo_um’ has no member named ‘x86_model’
      boot_cpu_data.x86_model == 5)

Maybe a "depends on X86_32 && !UML" would make more sense. hmm?

Thanks,
//richard