tcp: add tcp_min_snd_mss sysctl

[pandora-kernel.git] / kernel / extable.c

diff --git a/kernel/extable.c b/kernel/extable.c
index 7f8f263..ce211bb 100644 (file)
--- a/kernel/extable.c
+++ b/kernel/extable.c
@@ -28,6 +28,8 @@
  * mutex protecting text section modification (dynamic code patching).
  * some users need to sleep (allocating memory...) while they hold this lock.
  *
+ * Note: Also protects SMP-alternatives modification on x86.
+ *
  * NOT exported to modules - patching kernel text is a really delicate matter.
  */
 DEFINE_MUTEX(text_mutex);
@@ -72,6 +74,24 @@ int core_kernel_text(unsigned long addr)
        return 0;
 }
 
+/**
+ * core_kernel_data - tell if addr points to kernel data
+ * @addr: address to test
+ *
+ * Returns true if @addr passed in is from the core kernel data
+ * section.
+ *
+ * Note: On some archs it may return true for core RODATA, and false
+ *  for others. But will always be true for core RW data.
+ */
+int core_kernel_data(unsigned long addr)
+{
+       if (addr >= (unsigned long)_sdata &&
+           addr < (unsigned long)_edata)
+               return 1;
+       return 0;
+}
+
 int __kernel_text_address(unsigned long addr)
 {
        if (core_kernel_text(addr))