vmcoreinfo: use the existing offsetof() for VMCOREINFO_OFFSET()

It is better that the existing offsetof() is used for VMCOREINFO_OFFSET(). This discussion is the following: http://www.ussg.iu.edu/hypermail/linux/kernel/0709.3/0584.html Signed-off-by: Ken'ichi Ohmichi <[email protected]> Acked-by: Simon Horman <[email protected]> Cc: David Rientjes <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
chewitt · Feb 7, 2008 · 1e4f295 · 1e4f295
1 parent c76f860
commit 1e4f295
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
@@ -137,7 +137,7 @@ unsigned long paddr_vmcoreinfo_note(void);
 			      (unsigned long)sizeof(struct name))
 #define VMCOREINFO_OFFSET(name, field) \
 	vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
-			      (unsigned long)&(((struct name *)0)->field))
+			      (unsigned long)offsetof(struct name, field))
 #define VMCOREINFO_LENGTH(name, value) \
 	vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
 #define VMCOREINFO_NUMBER(name) \