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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-22 17:15:30 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-22 17:15:30 -0800
commit4b5f9254e4f4375ac845cb17f1732037dd8adeeb (patch)
tree92b5ad44c123b6dbd53e424292de0851b795fc5a /init
parent7b0b78df9cca7344960decf3a16805e8378a43b7 (diff)
parentbfe3911a91047557eb0e620f95a370aee6a248c7 (diff)
Merge tag 'topic/kcmp-kconfig-2021-02-22' of git://anongit.freedesktop.org/drm/drm
Pull kcmp kconfig update from Daniel Vetter: "Make the kcmp syscall available independently of checkpoint/restore. drm userspaces uses this, systemd uses this, so makes sense to pull it out from the checkpoint-restore bundle. Kees reviewed this from security pov and is happy with the final version" Link: https://lwn.net/Articles/845448/ * tag 'topic/kcmp-kconfig-2021-02-22' of git://anongit.freedesktop.org/drm/drm: kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 096e1af5c586..47a3d6502fbd 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1193,6 +1193,7 @@ endif # NAMESPACES
config CHECKPOINT_RESTORE
bool "Checkpoint/restore support"
select PROC_CHILDREN
+ select KCMP
default n
help
Enables additional kernel features in a sake of checkpoint/restore.
@@ -1736,6 +1737,16 @@ config ARCH_HAS_MEMBARRIER_CALLBACKS
config ARCH_HAS_MEMBARRIER_SYNC_CORE
bool
+config KCMP
+ bool "Enable kcmp() system call" if EXPERT
+ help
+ Enable the kernel resource comparison system call. It provides
+ user-space with the ability to compare two processes to see if they
+ share a common resource, such as a file descriptor or even virtual
+ memory space.
+
+ If unsure, say N.
+
config RSEQ
bool "Enable rseq() system call" if EXPERT
default y