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Re: [PATCH] bcm47xx: fix build regression

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On 5/30/2017 1:20 PM, Arnd Bergmann wrote:
An unknown change in the kernel headers caused a build regression
in an MTD partition driver:

In file included from drivers/mtd/bcm47xxpart.c:12:0:
include/linux/bcm47xx_nvram.h: In function 'bcm47xx_nvram_init_from_mem':
include/linux/bcm47xx_nvram.h:27:10: error: 'ENOTSUPP' undeclared (first use in this function)

Clearly we want to include linux/errno.h here.

unfortunate that you did not find the commit that caused this build regression. You could produce preprocessor output when it was working to see where errno.h got implicitly included and start looking there for git history.

Regards,
Arend

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
  include/linux/bcm47xx_nvram.h | 1 +
  1 file changed, 1 insertion(+)

diff --git a/include/linux/bcm47xx_nvram.h b/include/linux/bcm47xx_nvram.h
index 2793652fbf66..a414a2b53e41 100644
--- a/include/linux/bcm47xx_nvram.h
+++ b/include/linux/bcm47xx_nvram.h
@@ -8,6 +8,7 @@
  #ifndef __BCM47XX_NVRAM_H
  #define __BCM47XX_NVRAM_H
+#include <linux/errno.h>
  #include <linux/types.h>
  #include <linux/kernel.h>
  #include <linux/vmalloc.h>




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