4.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Arnd Bergmann <[email protected]> [ 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/[email protected] Fixes: 7efe48df8a3d ("vmcore: append device dumps to vmcore as elf notes") Signed-off-by: Arnd Bergmann <[email protected]> Cc: Ganesh Goudar <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Rahul Lakkireddy <[email protected]> Cc: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/proc/vmcore.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -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
