dtrace: better Kconfig documentation

It's still skeletal, but it's a lot better than oceans of "To be
written".

Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Acked-by: Kris Van Hees <kris.van.hees@oracle.com>

diff --git a/kernel/dtrace/Kconfig b/kernel/dtrace/Kconfig
index b5747c77a2ddcb4147aa171f2e3494af7b1a114a..e3317797d5f24887767b50cbbce255e8fffdb879 100644 (file)
--- a/kernel/dtrace/Kconfig
+++ b/kernel/dtrace/Kconfig
@@ -13,7 +13,7 @@ menuconfig DTRACE
        select WAITFD
        select CTF if (!DT_DISABLE_CTF)
        help
-         To be written.
+         The DTrace dynamic tracing framework.
 
 if DTRACE
 
@@ -21,7 +21,7 @@ config DT_CORE
        tristate "DTrace core"
        default m
        help
-         To be written.
+         The core of DTrace: needed for all providers.
 
 if DT_CORE
 
@@ -31,20 +31,22 @@ config DT_FASTTRAP
        depends on ARCH_SUPPORTS_UPROBES
        select UPROBE_EVENT
        help
-         To be written.
+         Userspace tracing, providing the kernel support needed for tracing
+         userspace programs.  Currently, only statically defined probes
+         (USDT) are supported.
 
 config DT_PROFILE
        tristate "Profile Interrupt Tracing"
        default m
        help
-         To be written.
+         The profile and tick providers, firing probes at specific intervals.
 
 config DT_SDT
        tristate "Statically Defined Tracing"
        default m
        select KALLSYMS
        help
-         To be written.
+         Statically defined tracepoints in the kernel.
 
 config DT_SDT_PERF
        bool "DTrace perf-events Probes"
@@ -52,7 +54,8 @@ config DT_SDT_PERF
         depends on DT_SDT
         select TRACEPOINTS
        help
-         To be written.
+         Provides the perf provider, containing a DTrace probe for each
+         perf-events tracepoint in the system.
 
 config DT_SYSTRACE
        tristate "System Call Tracing"
@@ -60,19 +63,20 @@ config DT_SYSTRACE
        select FTRACE
        select FTRACE_SYSCALLS
        help
-         To be written.
+         Provides DTrace probes at the entry and exit of all system calls,
+         in the syscall provider.
 
 config DT_DT_TEST
        tristate "DTrace Test Probe"
        default m
        help
-         To be written.
+         A test provider used by the testsuite.
 
 config DT_DT_PERF
        tristate "DTrace Performance Test Probe"
        default m
        help
-         To be written.
+         A test provider used for performance testing.
 
 config DT_DEBUG
        bool "DTrace debugging"