forked from luck/tmp_suning_uos_patched
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky: "A couple of bux fixes, notable are the regression with ptrace vs restarting system calls and the patch for kdump to be able to copy from virtual memory" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390: fix system call restart after inferior call s390: Allow vmalloc target buffers for copy_from_oldmem() s390/sclp: properly detect line mode console s390/kprobes: add exrl to list of prohibited opcodes s390/3270: fix return value check in tty3270_resize_work()
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commit
162bdafa46
@ -40,28 +40,26 @@ static inline void *load_real_addr(void *addr)
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}
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/*
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* Copy up to one page to vmalloc or real memory
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* Copy real to virtual or real memory
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*/
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static ssize_t copy_page_real(void *buf, void *src, size_t csize)
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static int copy_from_realmem(void *dest, void *src, size_t count)
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{
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size_t size;
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unsigned long size;
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int rc;
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if (is_vmalloc_addr(buf)) {
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BUG_ON(csize >= PAGE_SIZE);
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/* If buf is not page aligned, copy first part */
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size = min(roundup(__pa(buf), PAGE_SIZE) - __pa(buf), csize);
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if (size) {
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if (memcpy_real(load_real_addr(buf), src, size))
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return -EFAULT;
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buf += size;
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src += size;
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}
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/* Copy second part */
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size = csize - size;
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return (size) ? memcpy_real(load_real_addr(buf), src, size) : 0;
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} else {
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return memcpy_real(buf, src, csize);
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}
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if (!count)
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return 0;
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if (!is_vmalloc_or_module_addr(dest))
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return memcpy_real(dest, src, count);
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do {
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size = min(count, PAGE_SIZE - (__pa(dest) & ~PAGE_MASK));
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if (memcpy_real(load_real_addr(dest), src, size))
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return -EFAULT;
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count -= size;
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dest += size;
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src += size;
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} while (count);
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return 0;
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}
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/*
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@ -114,7 +112,7 @@ static ssize_t copy_oldmem_page_kdump(char *buf, size_t csize,
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rc = copy_to_user_real((void __force __user *) buf,
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(void *) src, csize);
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else
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rc = copy_page_real(buf, (void *) src, csize);
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rc = copy_from_realmem(buf, (void *) src, csize);
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return (rc == 0) ? rc : csize;
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}
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@ -210,7 +208,7 @@ int copy_from_oldmem(void *dest, void *src, size_t count)
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if (OLDMEM_BASE) {
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if ((unsigned long) src < OLDMEM_SIZE) {
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copied = min(count, OLDMEM_SIZE - (unsigned long) src);
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rc = memcpy_real(dest, src + OLDMEM_BASE, copied);
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rc = copy_from_realmem(dest, src + OLDMEM_BASE, copied);
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if (rc)
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return rc;
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}
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@ -223,7 +221,7 @@ int copy_from_oldmem(void *dest, void *src, size_t count)
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return rc;
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}
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}
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return memcpy_real(dest + copied, src + copied, count - copied);
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return copy_from_realmem(dest + copied, src + copied, count - copied);
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}
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/*
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@ -266,6 +266,7 @@ sysc_sigpending:
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tm __TI_flags+3(%r12),_TIF_SYSCALL
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jno sysc_return
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lm %r2,%r7,__PT_R2(%r11) # load svc arguments
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l %r10,__TI_sysc_table(%r12) # 31 bit system call table
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xr %r8,%r8 # svc 0 returns -ENOSYS
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clc __PT_INT_CODE+2(2,%r11),BASED(.Lnr_syscalls+2)
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jnl sysc_nr_ok # invalid svc number -> do svc 0
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@ -297,6 +297,7 @@ sysc_sigpending:
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tm __TI_flags+7(%r12),_TIF_SYSCALL
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jno sysc_return
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lmg %r2,%r7,__PT_R2(%r11) # load svc arguments
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lg %r10,__TI_sysc_table(%r12) # address of system call table
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lghi %r8,0 # svc 0 returns -ENOSYS
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llgh %r1,__PT_INT_CODE+2(%r11) # load new svc number
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cghi %r1,NR_syscalls
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@ -67,6 +67,11 @@ static int __kprobes is_prohibited_opcode(kprobe_opcode_t *insn)
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case 0xac: /* stnsm */
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case 0xad: /* stosm */
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return -EINVAL;
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case 0xc6:
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switch (insn[0] & 0x0f) {
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case 0x00: /* exrl */
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return -EINVAL;
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}
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}
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switch (insn[0]) {
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case 0x0101: /* pr */
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@ -180,7 +185,6 @@ static int __kprobes is_insn_relative_long(kprobe_opcode_t *insn)
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break;
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case 0xc6:
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switch (insn[0] & 0x0f) {
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case 0x00: /* exrl */
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case 0x02: /* pfdrl */
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case 0x04: /* cghrl */
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case 0x05: /* chrl */
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@ -145,9 +145,11 @@ bool __init sclp_has_linemode(void)
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if (sccb->header.response_code != 0x20)
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return 0;
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if (sccb->sclp_send_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK))
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return 1;
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return 0;
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if (!(sccb->sclp_send_mask & (EVTYP_OPCMD_MASK | EVTYP_PMSGCMD_MASK)))
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return 0;
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if (!(sccb->sclp_receive_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)))
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return 0;
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return 1;
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}
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bool __init sclp_has_vt220(void)
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@ -810,7 +810,7 @@ static void tty3270_resize_work(struct work_struct *work)
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struct winsize ws;
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screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols);
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if (!screen)
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if (IS_ERR(screen))
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return;
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/* Switch to new output size */
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spin_lock_bh(&tp->view.lock);
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