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s390: split TIF bits into CIF, PIF and TIF bits

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The oi and ni instructions used in entry[64].S to set and clear bits
in the thread-flags are not guaranteed to be atomic in regard to other
CPUs. Split the TIF bits into CPU, pt_regs and thread-info specific
bits. Updates on the TIF bits are done with atomic instructions,
updates on CPU and pt_regs bits are done with non-atomic instructions.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2014-04-15 12:55:07 +02:00
parent beef560b4c
commit d3a73acbc2
16 changed files with 173 additions and 126 deletions
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2
arch/s390/kernel/compat_signal.c
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@@ -213,7 +213,7 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
sizeof(current->thread.fp_regs));
restore_fp_regs(current->thread.fp_regs.fprs);
clear_thread_flag(TIF_SYSCALL); /* No longer in a system call */
clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */
return 0;
}