OMAP3: Warning: swp{b} use is deprecated for this architecture

[Jean Pihet]

Hi,

The following warning is issued by the compiler (gcc version 4.4.1
(Sourcery G++ Lite 2010q1-202):
arch/arm/mach-omap2/sleep34xx.S:87: Warning: swp{b} use is deprecated
for this architecture

Does this need fixing? If so any hint on how to do it?

Here is the offending code excerpt:

wait_sem:
        mov     r0,#1
        ldr     r1, sdrc_scratchpad_sem
wait_loop:
        ldr     r2, [r1]        @ load the lock value
        cmp     r2, r0          @ is the lock free ?
        beq     wait_loop       @ not free...
        swp     r2, r0, [r1]    @ semaphore free so lock it and proceed
        cmp     r2, r0          @ did we succeed ?
        beq     wait_sem        @ no - try again

Regards,
Jean