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arch/tile: work around a hardware issue with the return-address stack

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In certain circumstances we need to do a bunch of jump-and-link
instructions to fill the hardware return-address stack with nonzero values.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2012-03-29 14:52:00 -04:00
parent 5f639fdcd8
commit e17235382d
3 changed files with 22 additions and 2 deletions
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6
arch/tile/include/asm/traps.h
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@@ -64,7 +64,11 @@ void do_breakpoint(struct pt_regs *, int fault_num);
#ifdef __tilegx__
/* kernel/single_step.c */
void gx_singlestep_handle(struct pt_regs *, int fault_num);
/* kernel/intvec_64.S */
void fill_ra_stack(void);
#endif
#endif /* _ASM_TILE_SYSCALLS_H */
#endif /* _ASM_TILE_TRAPS_H */