openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[PATCH] ppc32: fix bogosity in process-freezing code 

The code that went into arch/ppc/kernel/signal.c recently to handle process
freezing seems to contain a dubious assumption: that a process that calls
do_signal when PF_FREEZE is set will have entered the kernel because of a
system call.  This patch removes that assumption.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paul Mackerras 2005-04-16 15:24:14 -07:00 committed by Linus Torvalds
parent 0c9b79429c
commit 16acbc624e
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/ppc/kernel/signal.c
View File

@ -708,7 +708,6 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
if (current->flags & PF_FREEZE) {
refrigerator(PF_FREEZE);
signr = 0;
ret = regs->gpr[3];
if (!signal_pending(current))
goto no_signal;
}
@ -719,7 +718,7 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
newsp = frame = 0;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
no_signal:
if (TRAP(regs) == 0x0C00 /* System Call! */
&& regs->ccr & 0x10000000 /* error signalled */
&& ((ret = regs->gpr[3]) == ERESTARTSYS
@ -735,7 +734,6 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
regs->gpr[3] = EINTR;
/* note that the cr0.SO bit is already set */
} else {
no_signal:
regs->nip -= 4; /* Back up & retry system call */
regs->result = 0;
regs->trap = 0;