4.18-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
[ 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 --- 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