Ethernet performance using TSE in uClinux

I am currently trying to put some functions in SSRAM on the MMU distribution, but having trouble. I added the section to the linker script as before, but offset for the kernel region:

        NOTES
+       . = KERNEL_REGION_BASE + SSRAM_BASE;
+       .ssram :
+       {
+               . = ALIGN(4);
+               *(.ssram)
+       }
+
        DISCARDS

I then tried adding a couple kernel functions to the section.

The results from System.map:

c04b59ac A _end
c5000000 T do_sync_write
c5000128 T vfs_write

When I add just do_sync_write, the system hangs after "RPC: Registered tcp NFSv4.1 backchannel transport module." When I add both, I get this at the same place:

r1:  c1c16000 r2:  00000000 r3:  00000000 r4:  c1c2b620
r5:  c1c681e0 r6:  00007e20 r7:  c1c16e1c r8:  6f6f7468
r9:  6f6f0000 r10: c1c43450 r11: c1c681e0 r12: 00000000
r13: c1c681e0 r14: c1c43452 r15: 006c6f6f              
ra:  c0072514 fp:  c01f8000 sp:  c1c16e18 gp:  00000000
ea:  c5000128 estatus:  00000001                       
Unaligned access from kernel mode, this might be a hardware
problem, dump registers and restart the instruction        
  BADADDR 0xc4fff891                                       
  cause   7                                                
  op-code 0x36bdd976

The address given is not a symbol, which makes me think some data address is getting shifted when I move the functions out of DDR, which makes me think this is a latent problem somewhere, but that's just guesswork.

Also, if I use IO_REGION_BASE instead of KERNEL_REGION_BASE, which by my understanding should have the same effect but non-cacheable, I get this link error:

fs/built-in.o: In function `vfs_write':
(.text+0x2ec8): relocation truncated to fit: R_NIOS2_CALL26 against `do_sync_write'
fs/built-in.o: In function `do_sync_write':
(.ssram+0xb4): relocation truncated to fit: R_NIOS2_CALL26 against `wait_on_retry_sync_kiocb'