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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-04-15 12:55:07 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-05-20 08:58:47 +0200 |
| commit | d3a73acbc26a4a81a01a35fd162973e53d0386f5 (patch) | |
| tree | 5b8fd3880f3b38575b1a043f3f4f07623a633bd1 /arch/s390/include/asm/lowcore.h | |
| parent | beef560b4cdfafb2211a856e1d722540f5151933 (diff) | |
| download | linux-d3a73acbc26a4a81a01a35fd162973e53d0386f5.tar.bz2 | |
s390: split TIF bits into CIF, PIF and TIF bits
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>
Diffstat (limited to 'arch/s390/include/asm/lowcore.h')
| -rw-r--r-- | arch/s390/include/asm/lowcore.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h index 3b476eb92f20..26e03ce27c50 100644 --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -93,7 +93,9 @@ struct _lowcore { __u32 save_area_sync[8]; /* 0x0200 */ __u32 save_area_async[8]; /* 0x0220 */ __u32 save_area_restart[1]; /* 0x0240 */ - __u8 pad_0x0244[0x0248-0x0244]; /* 0x0244 */ + + /* CPU flags. */ + __u32 cpu_flags; /* 0x0244 */ /* Return psws. */ psw_t return_psw; /* 0x0248 */ @@ -237,7 +239,9 @@ struct _lowcore { __u64 save_area_sync[8]; /* 0x0200 */ __u64 save_area_async[8]; /* 0x0240 */ __u64 save_area_restart[1]; /* 0x0280 */ - __u8 pad_0x0288[0x0290-0x0288]; /* 0x0288 */ + + /* CPU flags. */ + __u64 cpu_flags; /* 0x0288 */ /* Return psws. */ psw_t return_psw; /* 0x0290 */ |