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authorDavid Howells <dhowells@redhat.com>2009-09-02 04:14:16 -0400
committerJames Morris <jmorris@namei.org>2009-09-02 07:29:19 -0400
commitd0420c83f39f79afb82010c2d2cafd150eef651b (patch)
tree0aa939d78ed62bafdd6e38ca26451f8039392378 /arch/parisc/kernel
parent7b1b9164598286fe93927ff41eed2a2609fd9056 (diff)
KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures [try #6]
Implement TIF_NOTIFY_RESUME for most of those architectures in which isn't yet available, and, whilst we're at it, have it call the appropriate tracehook. After this patch, blackfin, m68k* and xtensa still lack support and need alteration of assembly code to make it work. Resume notification can then be used (by a later patch) to install a new session keyring on the parent of a process. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> cc: linux-arch@vger.kernel.org Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'arch/parisc/kernel')
-rw-r--r--arch/parisc/kernel/entry.S2
-rw-r--r--arch/parisc/kernel/signal.c5
2 files changed, 6 insertions, 1 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index e552e547cb93..8c4712b74dc1 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -948,7 +948,7 @@ intr_check_sig:
948 /* As above */ 948 /* As above */
949 mfctl %cr30,%r1 949 mfctl %cr30,%r1
950 LDREG TI_FLAGS(%r1),%r19 950 LDREG TI_FLAGS(%r1),%r19
951 ldi (_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK), %r20 951 ldi (_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK|_TIF_NOTIFY_RESUME), %r20
952 and,COND(<>) %r19, %r20, %r0 952 and,COND(<>) %r19, %r20, %r0
953 b,n intr_restore /* skip past if we've nothing to do */ 953 b,n intr_restore /* skip past if we've nothing to do */
954 954
diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index f82544225e8e..b3bfc4326703 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -645,4 +645,9 @@ void do_notify_resume(struct pt_regs *regs, long in_syscall)
645 if (test_thread_flag(TIF_SIGPENDING) || 645 if (test_thread_flag(TIF_SIGPENDING) ||
646 test_thread_flag(TIF_RESTORE_SIGMASK)) 646 test_thread_flag(TIF_RESTORE_SIGMASK))
647 do_signal(regs, in_syscall); 647 do_signal(regs, in_syscall);
648
649 if (test_thread_flag(TIF_NOTIFY_RESUME)) {
650 clear_thread_flag(TIF_NOTIFY_RESUME);
651 tracehook_notify_resume(regs);
652 }
648} 653}