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Blackfin: access_ok: permit L1 stack

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When apps run with their stack in L1, some system calls might be made
where a buffer is in the stack as an argument.  So make sure the core
Blackfin access code does not reject this memory location.

Signed-off-by: Barry Song <[email protected]>
Signed-off-by: Mike Frysinger <[email protected]>
This commit is contained in:
Barry Song 2010-06-29 08:43:38 +00:00 • committed by Mike Frysinger
commit 41c3e3346a
1 changed files with 5 additions and 0 deletions
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5
arch/blackfin/kernel/process.c
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@ -493,6 +493,11 @@ int _access_ok(unsigned long addr, unsigned long size)
return 1;
#endif
#ifndef CONFIG_EXCEPTION_L1_SCRATCH
if (in_mem_const(addr, size, (unsigned long)l1_stack_base, l1_stack_len))
return 1;
#endif
aret = in_async(addr, size);
if (aret < 2)
return aret;