ARM: dts: imx6ul: add support for Ka-Ro electronics TXUL mainboard

[karo-tx-linux.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index 22320804fbafdc57b7228b68392199657a7c2f49..651ec15ecddbd76f1fb46839691330e4f579c1b7 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -861,6 +861,28 @@ config LOG_CPU_MAX_BUF_SHIFT
                     13 =>   8 KB for each CPU
                     12 =>   4 KB for each CPU
 
+config NMI_LOG_BUF_SHIFT
+       int "Temporary per-CPU NMI log buffer size (12 => 4KB, 13 => 8KB)"
+       range 10 21
+       default 13
+       depends on PRINTK_NMI
+       help
+         Select the size of a per-CPU buffer where NMI messages are temporary
+         stored. They are copied to the main log buffer in a safe context
+         to avoid a deadlock. The value defines the size as a power of 2.
+
+         NMI messages are rare and limited. The largest one is when
+         a backtrace is printed. It usually fits into 4KB. Select
+         8KB if you want to be on the safe side.
+
+         Examples:
+                    17 => 128 KB for each CPU
+                    16 =>  64 KB for each CPU
+                    15 =>  32 KB for each CPU
+                    14 =>  16 KB for each CPU
+                    13 =>   8 KB for each CPU
+                    12 =>   4 KB for each CPU
+
 #
 # Architectures with an unreliable sched_clock() should select this:
 #
@@ -1420,6 +1442,28 @@ config KALLSYMS_ALL
 
           Say N unless you really need all symbols.
 
+config KALLSYMS_ABSOLUTE_PERCPU
+       bool
+       default X86_64 && SMP
+
+config KALLSYMS_BASE_RELATIVE
+       bool
+       depends on KALLSYMS
+       default !IA64 && !(TILE && 64BIT)
+       help
+         Instead of emitting them as absolute values in the native word size,
+         emit the symbol references in the kallsyms table as 32-bit entries,
+         each containing a relative value in the range [base, base + U32_MAX]
+         or, when KALLSYMS_ABSOLUTE_PERCPU is in effect, each containing either
+         an absolute value in the range [0, S32_MAX] or a relative value in the
+         range [base, base + S32_MAX], where base is the lowest relative symbol
+         address encountered in the image.
+
+         On 64-bit builds, this reduces the size of the address table by 50%,
+         but more importantly, it results in entries whose values are build
+         time constants, and no relocation pass is required at runtime to fix
+         up the entries based on the runtime load address of the kernel.
+
 config PRINTK
        default y
        bool "Enable support for printk" if EXPERT
@@ -1431,6 +1475,11 @@ config PRINTK
          very difficult to diagnose system problems, saying N here is
          strongly discouraged.
 
+config PRINTK_NMI
+       def_bool y
+       depends on PRINTK
+       depends on HAVE_NMI
+
 config BUG
        bool "BUG() support" if EXPERT
        default y
@@ -1550,6 +1599,19 @@ config AIO
          by some high performance threaded applications. Disabling
          this option saves about 7k.
 
+config AIO_THREAD
+       bool "Support kernel thread based AIO" if EXPERT
+       depends on AIO
+       default y
+       help
+          This option enables using kernel thread based AIO which implements
+          asynchronous operations using the kernel's queue_work() mechanism.
+          The automatic use of threads for async operations is currently
+          disabled by default until the security implications for usage
+          are completely understood.  This functionality can be enabled at
+          runtime if this option is enabled by setting the fs.aio-auto-threads
+          to one.
+
 config ADVISE_SYSCALLS
        bool "Enable madvise/fadvise syscalls" if EXPERT
        default y