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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2017-02-13 19:42:32 -0600 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2017-03-08 09:20:19 +0100 |
| commit | a768f78429fd9b0b07f5795dd62f31a519fc1bae (patch) | |
| tree | 125254b7533a22cbfea7c6df3d689eb294ec3a28 /arch/powerpc/kernel/signal.c | |
| parent | afb94c9e0b413bbdea779192eaca076c43ede031 (diff) | |
| download | linux-a768f78429fd9b0b07f5795dd62f31a519fc1bae.tar.bz2 | |
livepatch/powerpc: add TIF_PATCH_PENDING thread flag
Add the TIF_PATCH_PENDING thread flag to enable the new livepatch
per-task consistency model for powerpc. The bit getting set indicates
the thread has a pending patch which needs to be applied when the thread
exits the kernel.
The bit is included in the _TIF_USER_WORK_MASK macro so that
do_notify_resume() and klp_update_patch_state() get called when the bit
is set.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'arch/powerpc/kernel/signal.c')
| -rw-r--r-- | arch/powerpc/kernel/signal.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index 3a3671172436..e9436c5e1e09 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -14,6 +14,7 @@ #include <linux/uprobes.h> #include <linux/key.h> #include <linux/context_tracking.h> +#include <linux/livepatch.h> #include <asm/hw_breakpoint.h> #include <linux/uaccess.h> #include <asm/unistd.h> @@ -162,6 +163,9 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) tracehook_notify_resume(regs); } + if (thread_info_flags & _TIF_PATCH_PENDING) + klp_update_patch_state(current); + user_enter(); } |