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fs/proc/vmcore.c: hide vmcoredd_mmap_dumps() for nommu builds

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[ Upstream commit a2036a1ef2ee91acab01a0ae4a534070691a42ec ]

Without CONFIG_MMU, we get a build warning:

  fs/proc/vmcore.c:228:12: error: 'vmcoredd_mmap_dumps' defined but not used [-Werror=unused-function]
   static int vmcoredd_mmap_dumps(struct vm_area_struct *vma, unsigned long dst,

The function is only referenced from an #ifdef'ed caller, so
this uses the same #ifdef around it.

Link: http://lkml.kernel.org/r/20180525213526.2117790-1-arnd@arndb.de
Fixes: 7efe48df8a3d ("vmcore: append device dumps to vmcore as elf notes")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Ganesh Goudar <ganeshgr@chelsio.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2018-08-23 17:00:55 -07:00 committed by Greg Kroah-Hartman
parent 0de1a99801
commit df67ae0bd5
1 changed files with 2 additions and 0 deletions
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fs/proc/vmcore.c
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@ -225,6 +225,7 @@ out_unlock:
return ret;
}
#ifdef CONFIG_MMU
static int vmcoredd_mmap_dumps(struct vm_area_struct *vma, unsigned long dst,
u64 start, size_t size)
{
@ -259,6 +260,7 @@ out_unlock:
mutex_unlock(&vmcoredd_mutex);
return ret;
}
#endif /* CONFIG_MMU */
#endif /* CONFIG_PROC_VMCORE_DEVICE_DUMP */
/* Read from the ELF header and then the crash dump. On error, negative value is