summaryrefslogtreecommitdiff
path: root/arch/arm/include/asm/thread_info.h
diff options
context:
space:
mode:
authorVladimir Murzin <vladimir.murzin@arm.com>2014-11-27 11:39:04 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2014-11-27 15:55:35 +0000
commit3f4aa45ceea5789a4aade536acc27f2e0d3da5e1 (patch)
treedba92986639331c3ded36813c241fe9099180660 /arch/arm/include/asm/thread_info.h
parent995ab5189d1d7264e79e665dfa032a19b3ac646e (diff)
ARM: 8226/1: cacheflush: get rid of restarting block
We cannot restart cacheflush safely if a process provides user-defined signal handler and signal is pending. In this case -EINTR is returned and it is expected that process re-invokes syscall. However, there are a few problems with that: * looks like nobody bothers checking return value from cacheflush * but if it did, we don't provide the restart address for that, so the process has to use the same range again * ...and again, what might lead to looping forever So, remove cacheflush restarting code and terminate cache flushing as early as fatal signal is pending. Cc: stable@vger.kernel.org # 3.12+ Reported-by: Chanho Min <chanho.min@lge.com> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/thread_info.h')
-rw-r--r--arch/arm/include/asm/thread_info.h11
1 files changed, 0 insertions, 11 deletions
diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h
index fc44d3761f9e..ce73ab635414 100644
--- a/arch/arm/include/asm/thread_info.h
+++ b/arch/arm/include/asm/thread_info.h
@@ -44,16 +44,6 @@ struct cpu_context_save {
__u32 extra[2]; /* Xscale 'acc' register, etc */
};
-struct arm_restart_block {
- union {
- /* For user cache flushing */
- struct {
- unsigned long start;
- unsigned long end;
- } cache;
- };
-};
-
/*
* low level task data that entry.S needs immediate access to.
* __switch_to() assumes cpu_context follows immediately after cpu_domain.
@@ -79,7 +69,6 @@ struct thread_info {
unsigned long thumbee_state; /* ThumbEE Handler Base register */
#endif
struct restart_block restart_block;
- struct arm_restart_block arm_restart_block;
};
#define INIT_THREAD_INFO(tsk) \