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Blackfin: add new cacheflush syscall

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Flushing caches sometimes requires anomaly workarounds which require
supervisor-only insns.  Normally we don't need to flush caches from
userspace so this isn't a problem, but when gcc generates trampolines
on the stack, we do.

So add a new syscall for gcc to use modeled after the mips version.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Sonic Zhang
2010-09-06 10:16:04 +00:00
committed by Mike Frysinger
parent 73775b892e
commit 99a5b2878b
7 changed files with 44 additions and 3 deletions
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arch/blackfin/mach-common/entry.S
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@@ -1737,6 +1737,7 @@ ENTRY(_sys_call_table)
.long _sys_fanotify_init
.long _sys_fanotify_mark
.long _sys_prlimit64
.long _sys_cacheflush
.rept NR_syscalls-(.-_sys_call_table)/4
.long _sys_ni_syscall