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| author |   David S. Miller <davem@davemloft.net> | 2005-07-24 19:36:26 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-07-24 19:36:26 -0700 |
| commit | db7d9a4eb700be766cc9f29241483dbb1e748832 (patch) | |
| tree | 48848384df15d9404ceab05867d7f4ef6b1a4bbe /include/asm-sparc64/thread_info.h | |
| parent | [SPARC64]: Privatize sun5_timer. (diff) | |
| download | linux-dev-db7d9a4eb700be766cc9f29241483dbb1e748832.tar.xz linux-dev-db7d9a4eb700be766cc9f29241483dbb1e748832.zip | |
[SPARC64]: Move syscall success and newchild state out of thread flags.
These two bits were accesses non-atomically from assembler
code. So, in order to eliminate any potential races resulting
from that, move these pieces of state into two bytes elsewhere
in struct thread_info.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | include/asm-sparc64/thread_info.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/include/asm-sparc64/thread_info.h b/include/asm-sparc64/thread_info.h index a1d25c06f92a..352d9943661a 100644 --- a/include/asm-sparc64/thread_info.h +++ b/include/asm-sparc64/thread_info.h @@ -47,7 +47,9 @@ struct thread_info { struct pt_regs *kregs; struct exec_domain *exec_domain; int preempt_count; /* 0 => preemptable, <0 => BUG */ - int __pad; + __u8 new_child; + __u8 syscall_noerror; + __u16 __pad; unsigned long *utraps; @@ -87,6 +89,8 @@ struct thread_info { #define TI_KREGS 0x00000028 #define TI_EXEC_DOMAIN 0x00000030 #define TI_PRE_COUNT 0x00000038 +#define TI_NEW_CHILD 0x0000003c +#define TI_SYS_NOERROR 0x0000003d #define TI_UTRAPS 0x00000040 #define TI_REG_WINDOW 0x00000048 #define TI_RWIN_SPTRS 0x000003c8 @@ -219,10 +223,10 @@ register struct thread_info *current_thread_info_reg asm("g6"); #define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */ #define TIF_NEWSIGNALS 6 /* wants new-style signals */ #define TIF_32BIT 7 /* 32-bit binary */ -#define TIF_NEWCHILD 8 /* just-spawned child process */ +/* flag bit 8 is available */ #define TIF_SECCOMP 9 /* secure computing */ #define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */ -#define TIF_SYSCALL_SUCCESS 11 +/* flag bit 11 is available */ /* NOTE: Thread flags >= 12 should be ones we have no interest * in using in assembly, else we can't use the mask as * an immediate value in instructions such as andcc. @@ -239,10 +243,8 @@ register struct thread_info *current_thread_info_reg asm("g6"); #define _TIF_UNALIGNED (1<<TIF_UNALIGNED) #define _TIF_NEWSIGNALS (1<<TIF_NEWSIGNALS) #define _TIF_32BIT (1<<TIF_32BIT) -#define _TIF_NEWCHILD (1<<TIF_NEWCHILD) #define _TIF_SECCOMP (1<<TIF_SECCOMP) #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) -#define _TIF_SYSCALL_SUCCESS (1<<TIF_SYSCALL_SUCCESS) #define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |