lockdep: Clarify size for LOCKDEP_*_BITS configs

The LOCKDEP_*_BITS configs control the size of internal structures used
by lockdep. The size is calculated as a power of two of the configured
value (e.g. 16 => 64KB). Update these descriptions to more accurately
reflect this, as "Bitsize" can be misleading.

Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20241024183631.643450-3-cmllamas@google.com

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 7635b36ba06085ff13e64e996c7d7bdff219ac77..cf2a41dc76827f2fdf4d90bddc3f78b279453aef 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1502,7 +1502,7 @@ config LOCKDEP_SMALL
        bool
 
 config LOCKDEP_BITS
-       int "Bitsize for MAX_LOCKDEP_ENTRIES"
+       int "Size for MAX_LOCKDEP_ENTRIES (as Nth power of 2)"
        depends on LOCKDEP && !LOCKDEP_SMALL
        range 10 24
        default 15
@@ -1510,7 +1510,7 @@ config LOCKDEP_BITS
          Try increasing this value if you hit "BUG: MAX_LOCKDEP_ENTRIES too low!" message.
 
 config LOCKDEP_CHAINS_BITS
-       int "Bitsize for MAX_LOCKDEP_CHAINS"
+       int "Size for MAX_LOCKDEP_CHAINS (as Nth power of 2)"
        depends on LOCKDEP && !LOCKDEP_SMALL
        range 10 21
        default 16
@@ -1518,7 +1518,7 @@ config LOCKDEP_CHAINS_BITS
          Try increasing this value if you hit "BUG: MAX_LOCKDEP_CHAINS too low!" message.
 
 config LOCKDEP_STACK_TRACE_BITS
-       int "Bitsize for MAX_STACK_TRACE_ENTRIES"
+       int "Size for MAX_STACK_TRACE_ENTRIES (as Nth power of 2)"
        depends on LOCKDEP && !LOCKDEP_SMALL
        range 10 26
        default 19
@@ -1526,7 +1526,7 @@ config LOCKDEP_STACK_TRACE_BITS
          Try increasing this value if you hit "BUG: MAX_STACK_TRACE_ENTRIES too low!" message.
 
 config LOCKDEP_STACK_TRACE_HASH_BITS
-       int "Bitsize for STACK_TRACE_HASH_SIZE"
+       int "Size for STACK_TRACE_HASH_SIZE (as Nth power of 2)"
        depends on LOCKDEP && !LOCKDEP_SMALL
        range 10 26
        default 14
@@ -1534,7 +1534,7 @@ config LOCKDEP_STACK_TRACE_HASH_BITS
          Try increasing this value if you need large STACK_TRACE_HASH_SIZE.
 
 config LOCKDEP_CIRCULAR_QUEUE_BITS
-       int "Bitsize for elements in circular_queue struct"
+       int "Size for elements in circular_queue struct (as Nth power of 2)"
        depends on LOCKDEP
        range 10 26
        default 12