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-rw-r--r--init/Kconfig20
1 files changed, 1 insertions, 19 deletions
diff --git a/init/Kconfig b/init/Kconfig
index f88da2d1c1fb..8e8b76d8a272 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -324,17 +324,6 @@ config TREE_RCU
324 thousands of CPUs. It also scales down nicely to 324 thousands of CPUs. It also scales down nicely to
325 smaller systems. 325 smaller systems.
326 326
327config PREEMPT_RCU
328 bool "Preemptible RCU"
329 depends on PREEMPT
330 help
331 This option reduces the latency of the kernel by making certain
332 RCU sections preemptible. Normally RCU code is non-preemptible, if
333 this option is selected then read-only RCU sections become
334 preemptible. This helps latency, but may expose bugs due to
335 now-naive assumptions about each RCU read-side critical section
336 remaining on a given CPU through its execution.
337
338config TREE_PREEMPT_RCU 327config TREE_PREEMPT_RCU
339 bool "Preemptable tree-based hierarchical RCU" 328 bool "Preemptable tree-based hierarchical RCU"
340 depends on PREEMPT 329 depends on PREEMPT
@@ -348,7 +337,7 @@ endchoice
348 337
349config RCU_TRACE 338config RCU_TRACE
350 bool "Enable tracing for RCU" 339 bool "Enable tracing for RCU"
351 depends on TREE_RCU || PREEMPT_RCU || TREE_PREEMPT_RCU 340 depends on TREE_RCU || TREE_PREEMPT_RCU
352 help 341 help
353 This option provides tracing in RCU which presents stats 342 This option provides tracing in RCU which presents stats
354 in debugfs for debugging RCU implementation. 343 in debugfs for debugging RCU implementation.
@@ -395,13 +384,6 @@ config TREE_RCU_TRACE
395 TREE_PREEMPT_RCU implementations, permitting Makefile to 384 TREE_PREEMPT_RCU implementations, permitting Makefile to
396 trivially select kernel/rcutree_trace.c. 385 trivially select kernel/rcutree_trace.c.
397 386
398config PREEMPT_RCU_TRACE
399 def_bool RCU_TRACE && PREEMPT_RCU
400 select DEBUG_FS
401 help
402 This option provides tracing for the PREEMPT_RCU implementation,
403 permitting Makefile to trivially select kernel/rcupreempt_trace.c.
404
405endmenu # "RCU Subsystem" 387endmenu # "RCU Subsystem"
406 388
407config IKCONFIG 389config IKCONFIG