[PATCH 7/8] powerpc: Check arch.vec earlier during boot for memory features

[PATCH 7/8] powerpc: Check arch.vec earlier during boot for memory features

[Michael Bringmann]

architecture.vec5 features: The boot-time memory management needs to
know the form of the "ibm,dynamic-memory-v2" property early during
scanning of the flattened device tree.  This patch moves execution of
the function pseries_probe_fw_features() early enough to be before
the scanning of the memory properties in the device tree to allow
recognition of the supported properties.

Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com>
---
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 9d86c66..e4c5076 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -215,6 +215,8 @@ extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
 				   int depth, void *data);
 extern int early_init_dt_scan_recoverable_ranges(unsigned long node,
 				 const char *uname, int depth, void *data);
+extern int pseries_probe_fw_features(unsigned long node,
+				 const char *uname, int depth, void *data);
 
 extern int opal_get_chars(uint32_t vtermno, char *buf, int count);
 extern int opal_put_chars(uint32_t vtermno, const char *buf, int total_len);
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 946e34f..2034edc 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -777,6 +777,7 @@ void __init early_init_devtree(void *params)
 	of_scan_flat_dt(early_init_dt_scan_chosen_ppc, boot_command_line);
 
 	/* Scan memory nodes and rebuild MEMBLOCKs */
+	of_scan_flat_dt(pseries_probe_fw_features, NULL);
 	of_scan_flat_dt(early_init_dt_scan_root, NULL);
 	of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL);
 
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 9883bc7..f554205 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -736,7 +736,7 @@ static void pseries_power_off(void)
  * Called very early, MMU is off, device-tree isn't unflattened
  */
 
-static int __init pseries_probe_fw_features(unsigned long node,
+int __init pseries_probe_fw_features(unsigned long node,
 					    const char *uname, int depth,
 					    void *data)
 {
@@ -770,6 +770,7 @@ static int __init pseries_probe_fw_features(unsigned long node,
 
 	return hypertas_found && vec5_found;
 }
+EXPORT_SYMBOL(pseries_probe_fw_features);
 
 static int __init pSeries_probe(void)
 {

Re: [PATCH 7/8] powerpc: Check arch.vec earlier during boot for memory features

[kbuild test robot]

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Hi,

[auto build test ERROR on pci/next]
[cannot apply to powerpc/next next-20160725]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Michael-Bringmann/powerpc-devtree-Add-support-for-2-new-DRC-properties/20160726-063623
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: powerpc-allnoconfig (attached as .config)
compiler: powerpc-linux-gnu-gcc (Debian 5.4.0-6) 5.4.0 20160609
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/built-in.o: In function `early_init_devtree':
>> (.init.text+0x1072): undefined reference to `pseries_probe_fw_features'
   arch/powerpc/kernel/built-in.o: In function `early_init_devtree':
   (.init.text+0x107a): undefined reference to `pseries_probe_fw_features'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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