x86, ptrace: add bts_struct size to status command

Return the size of bts_struct in the PTRACE_BTS_STATUS command.
Change types to u32.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 10 insertions, 3 deletions

diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index e19a91db9b35..96286df1bb81 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -787,6 +787,8 @@ static int ptrace_bts_status(struct task_struct *child,
                         cfg.flags |= PTRACE_BTS_O_SCHED;
         }
 
+        cfg.bts_size = sizeof(struct bts_struct);
+
         if (copy_to_user(ucfg, &cfg, sizeof(cfg)))
                 return -EFAULT;
 
diff --git a/include/asm-x86/ptrace-abi.h b/include/asm-x86/ptrace-abi.h
index 08a12b790a77..81a8ee4c55fc 100644
--- a/include/asm-x86/ptrace-abi.h
+++ b/include/asm-x86/ptrace-abi.h
@@ -81,16 +81,21 @@
 #define PTRACE_SINGLEBLOCK      33      /* resume execution until next branch */
 
 #ifndef __ASSEMBLY__
+
+#include <asm/types.h>
+
 /* configuration/status structure used in PTRACE_BTS_CONFIG and
    PTRACE_BTS_STATUS commands.
 */
 struct ptrace_bts_config {
         /* requested or actual size of BTS buffer in bytes */
-        unsigned int size;
+        u32 size;
         /* bitmask of below flags */
-        unsigned int flags;
+        u32 flags;
         /* buffer overflow signal */
-        unsigned int signal;
+        u32 signal;
+        /* actual size of bts_struct in bytes */
+        u32 bts_size;
 };
 #endif