Move kernel README files to Markdown.

Test: N/A
Change-Id: If987d8a24baf87adba20914896d29c94fc01cbfd

libc/kernel/README.md

@@ -1,11 +1,10 @@
-Bionic Kernel Header Files
+# Bionic Kernel Header Files
-==========================
 
 Bionic comes with a processed set of all of the uapi Linux kernel headers that
 can safely be included by userland applications and libraries.
 
 These clean headers are automatically generated by several scripts located
-in the 'bionic/kernel/tools' directory. The tools process the original
+in the `tools/` directory. The tools process the original
 unmodified kernel headers in order to get rid of many annoying
 declarations and constructs that usually result in compilation failure.
 
@@ -18,36 +17,35 @@ They can be also included before or after any Bionic C library header.
 
 Description of the directories involved in generating the parsed kernel headers:
 
-  * 'external/kernel-headers/original/'
+  * `external/kernel-headers/original/`
     Contains the uapi kernel headers found in the android kernel. Note this
     also includes the header files that are generated by building the kernel
     sources.
 
-  * 'bionic/libc/kernel/uapi'
+  * `bionic/libc/kernel/uapi/`
     Contains the cleaned kernel headers and mirrors the directory structure
-    in 'external/kernel-headers/original/uapi/'.
+    in `external/kernel-headers/original/uapi/`.
 
-  * 'bionic/libc/kernel/tools'
+  * `bionic/libc/kernel/tools/`
     Contains various Python and shell scripts used to get and re-generate
     the headers.
 
 The tools to get/parse the headers:
 
-  * tools/generate_uapi_headers.sh
+  * `tools/generate_uapi_headers.sh`
     Checks out the android kernel and generates all uapi header files.
     copies all the changed files into external/kernel-headers.
 
-  * tools/clean_header.py
+  * `tools/clean_header.py`
     Prints the clean version of a given kernel header. With the -u option,
     this will also update the corresponding clean header file if its
     content has changed. You can also process more than one file with -u.
 
-  * tools/update_all.py
+  * `tools/update_all.py`
     Automatically update all clean headers from the content of
-    'external/kernel-headers/original'.
+    `external/kernel-headers/original/`.
 
-How To Update The Headers
+## How To Update The Headers
-=========================
 
 IMPORTANT IMPORTANT:
 
@@ -56,15 +54,17 @@ NOT BREAK THE KERNEL <-> USER ABI, FOR EXAMPLE BY CHANGING THE SIZE
 OF A GIVEN TYPE. THIS TASK CANNOT BE EASILY AUTOMATED AT THE MOMENT.
 
 Download the Linux kernel source code:
-
+```
   > mkdir kernel_src
   > cd kernel_src
   kernel_src> git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
+```
 
 Then checkout the stable tag for the new kernel headers to import:
-
+```
   kernel_src> cd linux-stable
   kernel_src/linux-stable> git checkout tags/vXXX
+```
 
 Before running the command to import the headers, make sure that you have
 done a lunch TARGET. The script uses a variable set by the lunch command
@@ -72,16 +72,19 @@ to determine which directory to use as the destination directory.
 
 After running lunch, run this command to import the headers into the android
 source tree:
-
+```
   bionic/libc/kernel/tools/generate_uapi_headers.sh --use-kernel-dir kernel_src
+```
 
 Next, run this command to copy the parsed files to bionic/libc/kernel/uapi:
-
+```
   bionic/libc/kernel/tools/update_all.py
+```
 
 Finally, run this command to regenerate the syscalls list:
-
+```
   bionic/libc/tools/gensyscalls.py
+```
 
 After this, you will need to build/test the tree to make sure that these
 changes do not introduce any errors.

libc/kernel/android/README.md

@@ -2,7 +2,7 @@ The files under the uapi directory are android kernel uapi header files that
 exist in android kernels, but have not been upstreamed into the regular
 kernel.
 
-None of these files will get updated automatically, and are frozen at their
+None of these files are updated automatically, and are frozen at their
 current value.
 
 The files under the scsi directory are frozen copies of kernel scsi headers.
@@ -12,6 +12,6 @@ maintainers manually copy-and-pasted these definitions into their own
 scsi headers and haven't substantially updated them in 15 years. The
 musl libc project has a similar set of definitions in its scsi headers.
 
-These files are actually maintained in external/kernel-headers/modified/scsi.
+These files are actually maintained in `external/kernel-headers/modified/scsi/`.
 Any modification should first be made there then copied into the scsi
 directory.