def_bool y
depends on BLOCK && MMU && (ZONE_DMA || HIGHMEM)
+# On the 'tile' arch, USB OHCI needs the bounce pool since tilegx will often
+# have more than 4GB of memory, but we don't currently use the IOTLB to present
+# a 32-bit address to OHCI. So we need to use a bounce pool instead.
+#
+# We also use the bounce pool to provide stable page writes for jbd. jbd
+# initiates buffer writeback without locking the page or setting PG_writeback,
+# and fixing that behavior (a second time; jbd2 doesn't have this problem) is
+# a major rework effort. Instead, use the bounce buffer to snapshot pages
+# (until jbd goes away). The only jbd user is ext3.
+config NEED_BOUNCE_POOL
+ bool
+ default y if (TILE && USB_OHCI_HCD) || (BLK_DEV_INTEGRITY && JBD)
+
config NR_QUICK
int
depends on QUICKLIST