Author: ray
Date: Sat Aug 31 21:28:06 2019
New Revision: 351649
URL: https://svnweb.freebsd.org/changeset/base/351649
Log:
ARM kernel can get RAM regions three ways:
o from FDT;
o from EFI;
o from Linux Boot API (ATAG).
U-Boot may pass RAM info all that 3 ways simultaneously.
We do select between FDT and EFI, but not for ATAG.
So this is not problem fix, but correctness check.
MFC after: 2 weeks
Modified:
head/sys/arm/arm/physmem.c
Modified: head/sys/arm/arm/physmem.c
==============================================================================
--- head/sys/arm/arm/physmem.c Sat Aug 31 20:45:45 2019 (r351648)
+++ head/sys/arm/arm/physmem.c Sat Aug 31 21:28:06 2019 (r351649)
@@ -264,6 +264,8 @@ insert_region(struct region *regions, size_t rcnt, vm_
ep = regions + rcnt;
for (i = 0, rp = regions; i < rcnt; ++i, ++rp) {
+ if (rp->addr == addr && rp->size == size) /* Pure dup. */
+ return (rcnt);
if (flags == rp->flags) {
if (addr + size == rp->addr) {
rp->addr = addr;
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