[kernel] drivers/dma/abma-pl08x.c: avoid a 64-bit division callout to libgcc

[Kyle McMartin]

commit 8260f13a38b832845e905dc43fde93ab2d396c21
Author: Kyle McMartin <kyle at redhat.com>
Date:   Mon Jul 29 11:57:43 2013 -0400

    drivers/dma/abma-pl08x.c: avoid a 64-bit division callout to libgcc

 arm-dma-amba_pl08x-avoid-64bit-division.patch |   33 +++++++++++++++++++++++++
 kernel.spec                                   |    5 ++++
 2 files changed, 38 insertions(+), 0 deletions(-)
---
diff --git a/arm-dma-amba_pl08x-avoid-64bit-division.patch b/arm-dma-amba_pl08x-avoid-64bit-division.patch
new file mode 100644
index 0000000..7556e23
--- /dev/null
+++ b/arm-dma-amba_pl08x-avoid-64bit-division.patch
@@ -0,0 +1,33 @@
+diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
+index 06fe45c..4ce4ac1 100644
+--- a/drivers/dma/amba-pl08x.c
++++ b/drivers/dma/amba-pl08x.c
+@@ -886,8 +886,8 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
+ 				return 0;
+ 			}
+ 
+-			if ((bd.srcbus.addr % bd.srcbus.buswidth) ||
+-					(bd.dstbus.addr % bd.dstbus.buswidth)) {
++			if ((((u8)(bd.srcbus.addr & 0xff)) % bd.srcbus.buswidth) ||
++					(((u8)(bd.dstbus.addr & 0xff)) % bd.dstbus.buswidth)) {
+ 				dev_err(&pl08x->adev->dev,
+ 					"%s src & dst address must be aligned to src"
+ 					" & dst width if peripheral is flow controller",
+@@ -908,7 +908,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
+ 		 */
+ 		if (bd.remainder < mbus->buswidth)
+ 			early_bytes = bd.remainder;
+-		else if ((mbus->addr) % (mbus->buswidth)) {
++		else if (((u8)(mbus->addr & 0xff)) % (mbus->buswidth)) {
+ 			early_bytes = mbus->buswidth - (mbus->addr) %
+ 				(mbus->buswidth);
+ 			if ((bd.remainder - early_bytes) < mbus->buswidth)
+@@ -928,7 +928,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
+ 			 * Master now aligned
+ 			 * - if slave is not then we must set its width down
+ 			 */
+-			if (sbus->addr % sbus->buswidth) {
++			if (((u8)(sbus->addr & 0xff)) % sbus->buswidth) {
+ 				dev_dbg(&pl08x->adev->dev,
+ 					"%s set down bus width to one byte\n",
+ 					__func__);
diff --git a/kernel.spec b/kernel.spec
index fbd2aeb..a27f99a 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -694,6 +694,7 @@ Patch15000: nowatchdog-on-virt.patch
 # lpae
 Patch21001: arm-lpae-ax88796.patch
 Patch21002: drm-exynos-fix-multiple-definition-build-error.patch
+Patch21003: arm-dma-amba_pl08x-avoid-64bit-division.patch
 
 # ARM omap
 Patch21010: arm-omap-load-tfp410.patch
@@ -1302,6 +1303,7 @@ ApplyPatch debug-bad-pte-modules.patch
 #
 ApplyPatch arm-lpae-ax88796.patch
 ApplyPatch drm-exynos-fix-multiple-definition-build-error.patch
+ApplyPatch arm-dma-amba_pl08x-avoid-64bit-division.patch
 ApplyPatch arm-omap-load-tfp410.patch
 ApplyPatch arm-tegra-usb-no-reset-linux33.patch
 ApplyPatch arm-tegra-remove-direct-vbus-regulator-control.patch
@@ -2246,6 +2248,9 @@ fi
 #                 ||----w |
 #                 ||     ||
 %changelog
+* Mon Jul 29 2013 Kyle McMartin <kyle at redhat.com>
+- arm-dma-amba_pl08x-avoid-64bit-division.patch: STAHP libgcc callouts
+
 * Mon Jul 29 2013 Josh Boyer <jwboyer at redhat.com> - 3.11.0-0.rc3.git0.1
 - Linux v3.11-rc3
 - Disable debugging options.