Merge branch 'akpm' (patches from Andrew)
authorLinus Torvalds <torvalds@linux-foundation.org>
Thu, 3 Aug 2017 21:58:13 +0000 (14:58 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 3 Aug 2017 21:58:13 +0000 (14:58 -0700)
Merge misc fixes from Andrew Morton:
 "15 fixes"

[ This does not merge the "fortify: use WARN instead of BUG for now"
  patch, which needs a bit of extra work to build cleanly with all
  configurations. Arnd is on it.   - Linus ]

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  ocfs2: don't clear SGID when inheriting ACLs
  mm: allow page_cache_get_speculative in interrupt context
  userfaultfd: non-cooperative: flush event_wqh at release time
  ipc: add missing container_of()s for randstruct
  cpuset: fix a deadlock due to incomplete patching of cpusets_enabled()
  userfaultfd_zeropage: return -ENOSPC in case mm has gone
  mm: take memory hotplug lock within numa_zonelist_order_handler()
  mm/page_io.c: fix oops during block io poll in swapin path
  zram: do not free pool->size_class
  kthread: fix documentation build warning
  kasan: avoid -Wmaybe-uninitialized warning
  userfaultfd: non-cooperative: notify about unmap of destination during mremap
  mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries
  pid: kill pidhash_size in pidhash_init()
  mm/hugetlb.c: __get_user_pages ignores certain follow_hugetlb_page errors

15 files changed:
Documentation/admin-guide/pm/cpufreq.rst
Documentation/power/runtime_pm.txt
arch/x86/kernel/cpu/aperfmperf.c
drivers/acpi/acpi_apd.c
drivers/acpi/acpi_lpss.c
drivers/acpi/acpi_watchdog.c
drivers/cpufreq/intel_pstate.c
drivers/isdn/i4l/isdn_common.c
drivers/isdn/i4l/isdn_net.c
drivers/mailbox/pcc.c
drivers/thunderbolt/icm.c
fs/nfs/nfs4client.c
fs/nfs/nfs4proc.c
fs/nfs/nfs4xdr.c
include/linux/nfs_xdr.h

index 463cf7e73db80b3bf3f8a36afe91bcf3d7f0d429..7af83a92d2d6103ea3fb0a3a0425e994b29f7f53 100644 (file)
@@ -237,6 +237,14 @@ are the following:
        This attribute is not present if the scaling driver in use does not
        support it.
 
+``cpuinfo_cur_freq``
+       Current frequency of the CPUs belonging to this policy as obtained from
+       the hardware (in KHz).
+
+       This is expected to be the frequency the hardware actually runs at.
+       If that frequency cannot be determined, this attribute should not
+       be present.
+
 ``cpuinfo_max_freq``
        Maximum possible operating frequency the CPUs belonging to this policy
        can run at (in kHz).
index 0fde3dcf077a302eb24ea6d8fd8df65c4b252d8e..625549d4c74a09642d72bce75387c15348406223 100644 (file)
@@ -435,7 +435,8 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h:
       PM status to 'suspended' and update its parent's counter of 'active'
       children as appropriate (it is only valid to use this function if
       'power.runtime_error' is set or 'power.disable_depth' is greater than
-      zero)
+      zero); it will fail and return an error code if the device has a child
+      which is active and the 'power.ignore_children' flag is unset
 
   bool pm_runtime_active(struct device *dev);
     - return true if the device's runtime PM status is 'active' or its
index d869c8671e364d55e343322b410fec9a3e5f66c6..7cf7c70b6ef2a20483361fb8333a85ace25bf1d7 100644 (file)
@@ -8,20 +8,25 @@
  * This file is licensed under GPLv2.
  */
 
-#include <linux/jiffies.h>
+#include <linux/delay.h>
+#include <linux/ktime.h>
 #include <linux/math64.h>
 #include <linux/percpu.h>
 #include <linux/smp.h>
 
 struct aperfmperf_sample {
        unsigned int    khz;
-       unsigned long   jiffies;
+       ktime_t time;
        u64     aperf;
        u64     mperf;
 };
 
 static DEFINE_PER_CPU(struct aperfmperf_sample, samples);
 
+#define APERFMPERF_CACHE_THRESHOLD_MS  10
+#define APERFMPERF_REFRESH_DELAY_MS    20
+#define APERFMPERF_STALE_THRESHOLD_MS  1000
+
 /*
  * aperfmperf_snapshot_khz()
  * On the current CPU, snapshot APERF, MPERF, and jiffies
@@ -33,9 +38,11 @@ static void aperfmperf_snapshot_khz(void *dummy)
        u64 aperf, aperf_delta;
        u64 mperf, mperf_delta;
        struct aperfmperf_sample *s = this_cpu_ptr(&samples);
+       ktime_t now = ktime_get();
+       s64 time_delta = ktime_ms_delta(now, s->time);
 
-       /* Don't bother re-computing within 10 ms */
-       if (time_before(jiffies, s->jiffies + HZ/100))
+       /* Don't bother re-computing within the cache threshold time. */
+       if (time_delta < APERFMPERF_CACHE_THRESHOLD_MS)
                return;
 
        rdmsrl(MSR_IA32_APERF, aperf);
@@ -51,22 +58,21 @@ static void aperfmperf_snapshot_khz(void *dummy)
        if (mperf_delta == 0)
                return;
 
-       /*
-        * if (cpu_khz * aperf_delta) fits into ULLONG_MAX, then
-        *      khz = (cpu_khz * aperf_delta) / mperf_delta
-        */
-       if (div64_u64(ULLONG_MAX, cpu_khz) > aperf_delta)
-               s->khz = div64_u64((cpu_khz * aperf_delta), mperf_delta);
-       else    /* khz = aperf_delta / (mperf_delta / cpu_khz) */
-               s->khz = div64_u64(aperf_delta,
-                       div64_u64(mperf_delta, cpu_khz));
-       s->jiffies = jiffies;
+       s->time = now;
        s->aperf = aperf;
        s->mperf = mperf;
+
+       /* If the previous iteration was too long ago, discard it. */
+       if (time_delta > APERFMPERF_STALE_THRESHOLD_MS)
+               s->khz = 0;
+       else
+               s->khz = div64_u64((cpu_khz * aperf_delta), mperf_delta);
 }
 
 unsigned int arch_freq_get_on_cpu(int cpu)
 {
+       unsigned int khz;
+
        if (!cpu_khz)
                return 0;
 
@@ -74,6 +80,12 @@ unsigned int arch_freq_get_on_cpu(int cpu)
                return 0;
 
        smp_call_function_single(cpu, aperfmperf_snapshot_khz, NULL, 1);
+       khz = per_cpu(samples.khz, cpu);
+       if (khz)
+               return khz;
+
+       msleep(APERFMPERF_REFRESH_DELAY_MS);
+       smp_call_function_single(cpu, aperfmperf_snapshot_khz, NULL, 1);
 
        return per_cpu(samples.khz, cpu);
 }
index fc6c416f8724670aef2f29d4d81d373ed400dcd5..d5999eb41c00176e840d90b84241ab855c8881c4 100644 (file)
@@ -180,8 +180,8 @@ static const struct acpi_device_id acpi_apd_device_ids[] = {
        { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
        { "BRCM900D", APD_ADDR(vulcan_spi_desc) },
        { "CAV900D",  APD_ADDR(vulcan_spi_desc) },
-       { "HISI0A21", APD_ADDR(hip07_i2c_desc) },
-       { "HISI0A22", APD_ADDR(hip08_i2c_desc) },
+       { "HISI02A1", APD_ADDR(hip07_i2c_desc) },
+       { "HISI02A2", APD_ADDR(hip08_i2c_desc) },
 #endif
        { }
 };
index e51a1e98e62f4f5ab5f2132184e9686ab1a1f3a9..f88caf5aab76217d73feb277b1918e399cc61beb 100644 (file)
@@ -85,6 +85,7 @@ static const struct lpss_device_desc lpss_dma_desc = {
 };
 
 struct lpss_private_data {
+       struct acpi_device *adev;
        void __iomem *mmio_base;
        resource_size_t mmio_size;
        unsigned int fixed_clk_rate;
@@ -155,6 +156,12 @@ static struct pwm_lookup byt_pwm_lookup[] = {
 
 static void byt_pwm_setup(struct lpss_private_data *pdata)
 {
+       struct acpi_device *adev = pdata->adev;
+
+       /* Only call pwm_add_table for the first PWM controller */
+       if (!adev->pnp.unique_id || strcmp(adev->pnp.unique_id, "1"))
+               return;
+
        if (!acpi_dev_present("INT33FD", NULL, -1))
                pwm_add_table(byt_pwm_lookup, ARRAY_SIZE(byt_pwm_lookup));
 }
@@ -180,6 +187,12 @@ static struct pwm_lookup bsw_pwm_lookup[] = {
 
 static void bsw_pwm_setup(struct lpss_private_data *pdata)
 {
+       struct acpi_device *adev = pdata->adev;
+
+       /* Only call pwm_add_table for the first PWM controller */
+       if (!adev->pnp.unique_id || strcmp(adev->pnp.unique_id, "1"))
+               return;
+
        pwm_add_table(bsw_pwm_lookup, ARRAY_SIZE(bsw_pwm_lookup));
 }
 
@@ -456,6 +469,7 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
                goto err_out;
        }
 
+       pdata->adev = adev;
        pdata->dev_desc = dev_desc;
 
        if (dev_desc->setup)
index 8c4e0a18460a78df600067da69537e6256d6bc1c..bf22c29d25179e937523c026c8028f644f3379f6 100644 (file)
@@ -86,7 +86,12 @@ void __init acpi_watchdog_init(void)
 
                found = false;
                resource_list_for_each_entry(rentry, &resource_list) {
-                       if (resource_contains(rentry->res, &res)) {
+                       if (rentry->res->flags == res.flags &&
+                           resource_overlaps(rentry->res, &res)) {
+                               if (res.start < rentry->res->start)
+                                       rentry->res->start = res.start;
+                               if (res.end > rentry->res->end)
+                                       rentry->res->end = res.end;
                                found = true;
                                break;
                        }
index 6cd50352563894bea24866d2d36d6b815d0abc20..0566455f233ed3cd663506321f08f7ae546862be 100644 (file)
@@ -1922,13 +1922,6 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
        return 0;
 }
 
-static unsigned int intel_pstate_get(unsigned int cpu_num)
-{
-       struct cpudata *cpu = all_cpu_data[cpu_num];
-
-       return cpu ? get_avg_frequency(cpu) : 0;
-}
-
 static void intel_pstate_set_update_util_hook(unsigned int cpu_num)
 {
        struct cpudata *cpu = all_cpu_data[cpu_num];
@@ -2169,7 +2162,6 @@ static struct cpufreq_driver intel_pstate = {
        .setpolicy      = intel_pstate_set_policy,
        .suspend        = intel_pstate_hwp_save_state,
        .resume         = intel_pstate_resume,
-       .get            = intel_pstate_get,
        .init           = intel_pstate_cpu_init,
        .exit           = intel_pstate_cpu_exit,
        .stop_cpu       = intel_pstate_stop_cpu,
index 89b09c51ab7cff64d20e24ff43fff8bd720d1ef3..38a5bb764c7b55cb8b742639e49756e413b4ab26 100644 (file)
@@ -1376,6 +1376,7 @@ isdn_ioctl(struct file *file, uint cmd, ulong arg)
                        if (arg) {
                                if (copy_from_user(bname, argp, sizeof(bname) - 1))
                                        return -EFAULT;
+                               bname[sizeof(bname)-1] = 0;
                        } else
                                return -EINVAL;
                        ret = mutex_lock_interruptible(&dev->mtx);
index c151c6daa67ee8aa2ae600b4462f146d85776335..f63a110b7bcb2d2257869484bd9b894d94b9b5d2 100644 (file)
@@ -2611,10 +2611,9 @@ isdn_net_newslave(char *parm)
        char newname[10];
 
        if (p) {
-               /* Slave-Name MUST not be empty */
-               if (!strlen(p + 1))
+               /* Slave-Name MUST not be empty or overflow 'newname' */
+               if (strscpy(newname, p + 1, sizeof(newname)) <= 0)
                        return NULL;
-               strcpy(newname, p + 1);
                *p = 0;
                /* Master must already exist */
                if (!(n = isdn_net_findif(parm)))
index ac91fd0d62c6e4e22c57ab354ceb56adfdaee48e..cbca5e51b9759c57813b8579a2d38318bab39e02 100644 (file)
@@ -92,7 +92,7 @@ static struct mbox_controller pcc_mbox_ctrl = {};
  */
 static struct mbox_chan *get_pcc_channel(int id)
 {
-       if (id < 0 || id > pcc_mbox_ctrl.num_chans)
+       if (id < 0 || id >= pcc_mbox_ctrl.num_chans)
                return ERR_PTR(-ENOENT);
 
        return &pcc_mbox_channels[id];
index 8ee34029021986c94319e20adf4d36ce1d4ef374..bdaac1ff00a5af7518da6e3e03a2c8e6ef99a11b 100644 (file)
@@ -904,7 +904,14 @@ static int icm_driver_ready(struct tb *tb)
 
 static int icm_suspend(struct tb *tb)
 {
-       return nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_SAVE_DEVS, 0);
+       int ret;
+
+       ret = nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_SAVE_DEVS, 0);
+       if (ret)
+               tb_info(tb, "Ignoring mailbox command error (%d) in %s\n",
+                       ret, __func__);
+
+       return 0;
 }
 
 /*
index 50566acb54694ac4f14330f4bbb7ab360ba15f88..e9bea90dc0179770b9fbfa39fe6651c5949f0d62 100644 (file)
@@ -660,9 +660,6 @@ int nfs4_detect_session_trunking(struct nfs_client *clp,
        if (!nfs4_check_server_scope(clp->cl_serverscope, res->server_scope))
                goto out_err;
 
-       /* Session trunking passed, add the xprt */
-       rpc_clnt_xprt_switch_add_xprt(clp->cl_rpcclient, xprt);
-
        pr_info("NFS:  %s: Session trunking succeeded for %s\n",
                clp->cl_hostname,
                xprt->address_strings[RPC_DISPLAY_ADDR]);
index 18ca6879d8de9ecebf22d0f4f9ba73b66fdeeddc..ffd2e712595d8ac875dc2780b52731543c687ca8 100644 (file)
@@ -7461,7 +7461,7 @@ static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
                        cdata->res.server_scope = NULL;
                }
                /* Save the EXCHANGE_ID verifier session trunk tests */
-               memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
+               memcpy(clp->cl_confirm.data, cdata->args.verifier.data,
                       sizeof(clp->cl_confirm.data));
        }
 out:
@@ -7474,10 +7474,6 @@ static void nfs4_exchange_id_release(void *data)
        struct nfs41_exchange_id_data *cdata =
                                        (struct nfs41_exchange_id_data *)data;
 
-       if (cdata->xprt) {
-               xprt_put(cdata->xprt);
-               rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
-       }
        nfs_put_client(cdata->args.client);
        kfree(cdata->res.impl_id);
        kfree(cdata->res.server_scope);
@@ -7498,7 +7494,6 @@ static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
                        u32 sp4_how, struct rpc_xprt *xprt)
 {
-       nfs4_verifier verifier;
        struct rpc_message msg = {
                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
                .rpc_cred = cred,
@@ -7507,7 +7502,7 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
                .rpc_client = clp->cl_rpcclient,
                .callback_ops = &nfs4_exchange_id_call_ops,
                .rpc_message = &msg,
-               .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
+               .flags = RPC_TASK_TIMEOUT,
        };
        struct nfs41_exchange_id_data *calldata;
        struct rpc_task *task;
@@ -7522,8 +7517,7 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
                return -ENOMEM;
        }
 
-       if (!xprt)
-               nfs4_init_boot_verifier(clp, &verifier);
+       nfs4_init_boot_verifier(clp, &calldata->args.verifier);
 
        status = nfs4_init_uniform_client_string(clp);
        if (status)
@@ -7562,11 +7556,9 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
        if (xprt) {
                calldata->xprt = xprt;
                task_setup_data.rpc_xprt = xprt;
-               task_setup_data.flags =
-                               RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
-               calldata->args.verifier = &clp->cl_confirm;
-       } else {
-               calldata->args.verifier = &verifier;
+               task_setup_data.flags |= RPC_TASK_SOFTCONN;
+               memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
+                               sizeof(calldata->args.verifier.data));
        }
        calldata->args.client = clp;
 #ifdef CONFIG_NFS_V4_1_MIGRATION
@@ -7585,12 +7577,7 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
        if (IS_ERR(task))
                return PTR_ERR(task);
 
-       if (!xprt) {
-               status = rpc_wait_for_completion_task(task);
-               if (!status)
-                       status = calldata->rpc_status;
-       } else  /* session trunking test */
-               status = calldata->rpc_status;
+       status = calldata->rpc_status;
 
        rpc_put_task(task);
 out:
index fa3eb361d4f863be18072272293dcbdcedfd887f..37c8af00327588d772610cac487fcf0651cf8fbf 100644 (file)
@@ -1785,7 +1785,7 @@ static void encode_exchange_id(struct xdr_stream *xdr,
        int len = 0;
 
        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
-       encode_nfs4_verifier(xdr, args->verifier);
+       encode_nfs4_verifier(xdr, &args->verifier);
 
        encode_string(xdr, strlen(args->client->cl_owner_id),
                        args->client->cl_owner_id);
index ca3bcc4ed4e55563ecd505fada0cc0dc1f5dbb8d..62cbcb842f99c2cbda7121bcb5a4ebc5e818a3bc 100644 (file)
@@ -1235,7 +1235,7 @@ struct nfs41_state_protection {
 
 struct nfs41_exchange_id_args {
        struct nfs_client               *client;
-       nfs4_verifier                   *verifier;
+       nfs4_verifier                   verifier;
        u32                             flags;
        struct nfs41_state_protection   state_protect;
 };