linux-kernel - linux-next: build failure after merge of the arm tree

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Date:   Fri, 21 Apr 2017 08:40:33 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Russell King <rmk@...linux.org.uk>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mason <slash.tmp@...e.fr>
Subject: linux-next: build failure after merge of the arm tree

Hi Russell,

After merging the arm tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

In file included from include/linux/bitops.h:36:0,
                 from include/linux/bitmap.h:7,
                 from drivers/dma/sun4i-dma.c:11:
drivers/dma/sun4i-dma.c: In function 'find_and_use_pchan':
include/linux/bitops.h:56:34: error: passing argument 1 of '_find_next_zero_bit_le' from incompatible pointer type [-Werror=incompatible-pointer-types]
  for ((bit) = find_next_zero_bit((addr), (size), (bit)); \
                                  ^
arch/arm/include/asm/bitops.h:200:61: note: in definition of macro 'find_next_zero_bit'
 #define find_next_zero_bit(p,sz,off) _find_next_zero_bit_le(p,sz,off)
                                                             ^
drivers/dma/sun4i-dma.c:241:2: note: in expansion of macro 'for_each_clear_bit_from'
  for_each_clear_bit_from(i, &priv->pchans_used, max) {
  ^
arch/arm/include/asm/bitops.h:163:12: note: expected 'const long unsigned int *' but argument is of type 'long unsigned int (*)[1]'
 extern int _find_next_zero_bit_le(const unsigned long *p, int size, int offset);
            ^
include/linux/bitops.h:58:34: error: passing argument 1 of '_find_next_zero_bit_le' from incompatible pointer type [-Werror=incompatible-pointer-types]
       (bit) = find_next_zero_bit((addr), (size), (bit) + 1))
                                  ^
arch/arm/include/asm/bitops.h:200:61: note: in definition of macro 'find_next_zero_bit'
 #define find_next_zero_bit(p,sz,off) _find_next_zero_bit_le(p,sz,off)
                                                             ^
drivers/dma/sun4i-dma.c:241:2: note: in expansion of macro 'for_each_clear_bit_from'
  for_each_clear_bit_from(i, &priv->pchans_used, max) {
  ^
arch/arm/include/asm/bitops.h:163:12: note: expected 'const long unsigned int *' but argument is of type 'long unsigned int (*)[1]'
 extern int _find_next_zero_bit_le(const unsigned long *p, int size, int offset);
            ^

Caused (or exposed) by commit

  c4f8ff16b46b ("ARM: 8669/1: bitops: Align prototypes to generic API")

I have used the arm tree from next-20170420 for today.

-- 
Cheers,
Stephen Rothwell