x86/kvm/tracing: Use helper function trace_seq_buffer_ptr()

To allow for the restructiong of the trace_seq code, we need users
of it to use the helper functions instead of accessing the internals
of the trace_seq structure itself.

Link: http://lkml.kernel.org/r/20141104160221.585025609@goodmis.org
Tested-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Mark Rustad <mark.d.rustad@intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.cz>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h
index 5aaf356417682f2d2c666f187d68d307b5a71d99..ce463a9cc8fb253d426bfabb9bb786a69a26fc55 100644 (file)
--- a/arch/x86/kvm/mmutrace.h
+++ b/arch/x86/kvm/mmutrace.h
@@ -22,7 +22,7 @@
        __entry->unsync = sp->unsync;
 
 #define KVM_MMU_PAGE_PRINTK() ({                                       \
-       const u32 saved_len = p->len;                                   \
+       const char *saved_ptr = trace_seq_buffer_ptr(p);                \
        static const char *access_str[] = {                             \
                "---", "--x", "w--", "w-x", "-u-", "-ux", "wu-", "wux"  \
        };                                                              \
@@ -41,7 +41,7 @@
                         role.nxe ? "" : "!",                           \
                         __entry->root_count,                           \
                         __entry->unsync ? "unsync" : "sync", 0);       \
-       p->buffer + saved_len;                                          \
+       saved_ptr;                                                      \
                })
 
 #define kvm_mmu_trace_pferr_flags       \