linux/arch
Waiman Long 453431a549 mm, treewide: rename kzfree() to kfree_sensitive()
As said by Linus:

  A symmetric naming is only helpful if it implies symmetries in use.
  Otherwise it's actively misleading.

  In "kzalloc()", the z is meaningful and an important part of what the
  caller wants.

  In "kzfree()", the z is actively detrimental, because maybe in the
  future we really _might_ want to use that "memfill(0xdeadbeef)" or
  something. The "zero" part of the interface isn't even _relevant_.

The main reason that kzfree() exists is to clear sensitive information
that should not be leaked to other future users of the same memory
objects.

Rename kzfree() to kfree_sensitive() to follow the example of the recently
added kvfree_sensitive() and make the intention of the API more explicit.
In addition, memzero_explicit() is used to clear the memory to make sure
that it won't get optimized away by the compiler.

The renaming is done by using the command sequence:

  git grep -w --name-only kzfree |\
  xargs sed -i 's/kzfree/kfree_sensitive/'

followed by some editing of the kfree_sensitive() kerneldoc and adding
a kzfree backward compatibility macro in slab.h.

[akpm@linux-foundation.org: fs/crypto/inline_crypt.c needs linux/slab.h]
[akpm@linux-foundation.org: fix fs/crypto/inline_crypt.c some more]

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Joe Perches <joe@perches.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: "Jason A . Donenfeld" <Jason@zx2c4.com>
Link: http://lkml.kernel.org/r/20200616154311.12314-3-longman@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:22 -07:00
..
alpha dma-mapping updates for 5.9 2020-08-04 17:29:57 -07:00
arc fork-v5.9 2020-08-04 14:47:45 -07:00
arm sound updates for 5.9 2020-08-06 14:27:31 -07:00
arm64 s390: implement diag318 2020-08-06 12:59:31 -07:00
c6x Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
csky arch/csky patches for 5.9-rc1 2020-08-06 10:15:28 -07:00
h8300 fork-v5.9 2020-08-04 14:47:45 -07:00
hexagon fork-v5.9 2020-08-04 14:47:45 -07:00
ia64 It's been a busy cycle for documentation - hopefully the busiest for a 2020-08-04 22:47:54 -07:00
m68k close-range-v5.9 2020-08-04 15:12:02 -07:00
microblaze close-range-v5.9 2020-08-04 15:12:02 -07:00
mips s390: implement diag318 2020-08-06 12:59:31 -07:00
nds32 arch: rename copy_thread_tls() back to copy_thread() 2020-07-04 23:41:37 +02:00
nios2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
openrisc fork-v5.9 2020-08-04 14:47:45 -07:00
parisc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
powerpc s390: implement diag318 2020-08-06 12:59:31 -07:00
riscv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
s390 mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
sh It's been a busy cycle for documentation - hopefully the busiest for a 2020-08-04 22:47:54 -07:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
um TTY/Serial patches for 5.9-rc1 2020-08-06 14:56:11 -07:00
x86 mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
xtensa Xtensa updates for v5.9: 2020-08-06 10:07:40 -07:00
.gitignore
Kconfig It's been a busy cycle for documentation - hopefully the busiest for a 2020-08-04 22:47:54 -07:00