From 72392ed0eb6fde96826cb9d66bd4f50a7ba61450 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Fri, 5 Dec 2014 23:41:33 +0100 Subject: [PATCH] kernfs: Fix kernfs_name_compare Returning a difference from a comparison functions is usually wrong (see acbbe6fbb240 "kcmp: fix standard comparison bug" for the long story). Here there is the additional twist that if the void pointers ns and kn->ns happen to differ by a multiple of 2^32, kernfs_name_compare returns 0, falsely reporting a match to the caller. Technically 'hash - kn->hash' is ok since the hashes are restricted to 31 bits, but it's better to avoid that subtlety. Signed-off-by: Rasmus Villemoes Acked-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- Reading git-format-patch failed