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| author |   Russell King <rmk+kernel@arm.linux.org.uk> | 2013-01-19 15:27:30 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-01-19 15:27:30 +0000 |
| commit | 210b1847b32951f52d19df229972399e5b987de2 (patch) | |
| tree | be6eeb3ba76b4f4331c98d5ba47aa233bea8f22d /ipc/msgutil.c | |
| parent | ARM: 7629/1: mm: Fix missing XN flag for for MT_MEMORY_SO (diff) | |
| parent | ARM: virt: simplify __hyp_stub_install epilog (diff) | |
| download | wireguard-linux-210b1847b32951f52d19df229972399e5b987de2.tar.xz wireguard-linux-210b1847b32951f52d19df229972399e5b987de2.zip | |
Merge branch 'for-rmk/virt/hyp-boot/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into fixes
Diffstat (limited to 'ipc/msgutil.c')
| -rw-r--r-- | ipc/msgutil.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/ipc/msgutil.c b/ipc/msgutil.c index 6471f1bdae96..ebfcbfa8b7f2 100644 --- a/ipc/msgutil.c +++ b/ipc/msgutil.c @@ -102,7 +102,50 @@ out_err: free_msg(msg); return ERR_PTR(err); } +#ifdef CONFIG_CHECKPOINT_RESTORE +struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst) +{ + struct msg_msgseg *dst_pseg, *src_pseg; + int len = src->m_ts; + int alen; + + BUG_ON(dst == NULL); + if (src->m_ts > dst->m_ts) + return ERR_PTR(-EINVAL); + alen = len; + if (alen > DATALEN_MSG) + alen = DATALEN_MSG; + + dst->next = NULL; + dst->security = NULL; + + memcpy(dst + 1, src + 1, alen); + + len -= alen; + dst_pseg = dst->next; + src_pseg = src->next; + while (len > 0) { + alen = len; + if (alen > DATALEN_SEG) + alen = DATALEN_SEG; + memcpy(dst_pseg + 1, src_pseg + 1, alen); + dst_pseg = dst_pseg->next; + len -= alen; + src_pseg = src_pseg->next; + } + + dst->m_type = src->m_type; + dst->m_ts = src->m_ts; + + return dst; +} +#else +struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst) +{ + return ERR_PTR(-ENOSYS); +} +#endif int store_msg(void __user *dest, struct msg_msg *msg, int len) { int alen; |