[PATCH 03 of 18] libxc: remove unnecessary double indirection from xc_readconsolering

[Ian Campbell <ian.campbell@citrix.com>]

# HG changeset patch
# User Ian Campbell <ian.campbell@citrix.com>
# Date 1286892401 -3600
# Node ID a577eeeb43690b9df6be4789ced815e0c8e4cf13
# Parent  29a5439889c36e72df0f0828aee8f2b002a545b9
libxc: remove unnecessary double indirection from xc_readconsolering

The double indirection has been unnecessary since 9867:ec61a8c25429,
there is no possibility of the buffer being reallocated now.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>

diff -r 29a5439889c3 -r a577eeeb4369 tools/console/daemon/io.c
--- a/tools/console/daemon/io.c	Tue Oct 12 15:06:41 2010 +0100
+++ b/tools/console/daemon/io.c	Tue Oct 12 15:06:41 2010 +0100
@@ -887,7 +887,7 @@ static void handle_hv_logs(void)
 	if ((port = xc_evtchn_pending(xce_handle)) == -1)
 		return;
 
-	if (xc_readconsolering(xch, &bufptr, &size, 0, 1, &index) == 0 && size > 0) {
+	if (xc_readconsolering(xch, bufptr, &size, 0, 1, &index) == 0 && size > 0) {
 		int logret;
 		if (log_time_hv)
 			logret = write_with_timestamp(log_hv_fd, buffer, size,
diff -r 29a5439889c3 -r a577eeeb4369 tools/libxc/xc_misc.c
--- a/tools/libxc/xc_misc.c	Tue Oct 12 15:06:41 2010 +0100
+++ b/tools/libxc/xc_misc.c	Tue Oct 12 15:06:41 2010 +0100
@@ -22,13 +22,12 @@
 #include <xen/hvm/hvm_op.h>
 
 int xc_readconsolering(xc_interface *xch,
-                       char **pbuffer,
+                       char *buffer,
                        unsigned int *pnr_chars,
                        int clear, int incremental, uint32_t *pindex)
 {
     int ret;
     DECLARE_SYSCTL;
-    char *buffer = *pbuffer;
     unsigned int nr_chars = *pnr_chars;
 
     sysctl.cmd = XEN_SYSCTL_readconsole;
diff -r 29a5439889c3 -r a577eeeb4369 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h	Tue Oct 12 15:06:41 2010 +0100
+++ b/tools/libxc/xenctrl.h	Tue Oct 12 15:06:41 2010 +0100
@@ -729,7 +729,7 @@ int xc_physdev_pci_access_modify(xc_inte
                                  int enable);
 
 int xc_readconsolering(xc_interface *xch,
-                       char **pbuffer,
+                       char *buffer,
                        unsigned int *pnr_chars,
                        int clear, int incremental, uint32_t *pindex);
 
diff -r 29a5439889c3 -r a577eeeb4369 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c	Tue Oct 12 15:06:41 2010 +0100
+++ b/tools/libxl/libxl.c	Tue Oct 12 15:06:41 2010 +0100
@@ -3464,7 +3464,7 @@ int libxl_xen_console_read_line(libxl_ct
     int ret;
 
     memset(cr->buffer, 0, cr->size);
-    ret = xc_readconsolering(ctx->xch, &cr->buffer, &cr->count,
+    ret = xc_readconsolering(ctx->xch, cr->buffer, &cr->count,
                              cr->clear, cr->incremental, &cr->index);
     if (ret < 0) {
         LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "reading console ring buffer");
diff -r 29a5439889c3 -r a577eeeb4369 tools/python/xen/lowlevel/xc/xc.c
--- a/tools/python/xen/lowlevel/xc/xc.c	Tue Oct 12 15:06:41 2010 +0100
+++ b/tools/python/xen/lowlevel/xc/xc.c	Tue Oct 12 15:06:41 2010 +0100
@@ -1116,7 +1116,7 @@ static PyObject *pyxc_readconsolering(Xc
          !str )
         return NULL;
 
-    ret = xc_readconsolering(self->xc_handle, &str, &count, clear,
+    ret = xc_readconsolering(self->xc_handle, str, &count, clear,
                              incremental, &index);
     if ( ret < 0 )
         return pyxc_error_to_exception(self->xc_handle);
@@ -1133,7 +1133,7 @@ static PyObject *pyxc_readconsolering(Xc
 
         str = ptr + count;
         count = size - count;
-        ret = xc_readconsolering(self->xc_handle, &str, &count, clear,
+        ret = xc_readconsolering(self->xc_handle, str, &count, clear,
                                  1, &index);
         if ( ret < 0 )
             break;