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From: "Alice Ferrazzi" <alicef@gentoo.org>
To: gentoo-commits@lists.gentoo.org
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Message-ID: <1477992909.97a0e1c0517542f965b73dac372a47f9e72d2562.alicef@gentoo>
Subject: [gentoo-commits] proj/linux-patches:3.18 commit in: /
X-VCS-Repository: proj/linux-patches
X-VCS-Files: 0000_README 1043_linux-3.18.44.patch
X-VCS-Directories: /
X-VCS-Committer: alicef
X-VCS-Committer-Name: Alice Ferrazzi
X-VCS-Revision: 97a0e1c0517542f965b73dac372a47f9e72d2562
X-VCS-Branch: 3.18
Date: Tue, 1 Nov 2016 09:36:14 +0000 (UTC)
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commit: 97a0e1c0517542f965b73dac372a47f9e72d2562
Author: Alice Ferrazzi <alicef <AT> gentoo <DOT> org>
AuthorDate: Tue Nov 1 09:35:09 2016 +0000
Commit: Alice Ferrazzi <alicef <AT> gentoo <DOT> org>
CommitDate: Tue Nov 1 09:35:09 2016 +0000
URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=97a0e1c0
Linux patch 3.18.44
0000_README | 4 ++
1043_linux-3.18.44.patch | 174 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 178 insertions(+)
diff --git a/0000_README b/0000_README
index cc667fc..bfb562d 100644
--- a/0000_README
+++ b/0000_README
@@ -215,6 +215,10 @@ Patch: 1042_linux-3.18.43.patch
From: http://www.kernel.org
Desc: Linux 3.18.43
+Patch: 1043_linux-3.18.44.patch
+From: http://www.kernel.org
+Desc: Linux 3.18.44
+
Patch: 1500_XATTR_USER_PREFIX.patch
From: https://bugs.gentoo.org/show_bug.cgi?id=470644
Desc: Support for namespace user.pax.* on tmpfs.
diff --git a/1043_linux-3.18.44.patch b/1043_linux-3.18.44.patch
new file mode 100644
index 0000000..2661d2c
--- /dev/null
+++ b/1043_linux-3.18.44.patch
@@ -0,0 +1,174 @@
+diff --git a/Makefile b/Makefile
+index 28912c341bd8..05b64e6d1456 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,6 +1,6 @@
+ VERSION = 3
+ PATCHLEVEL = 18
+-SUBLEVEL = 43
++SUBLEVEL = 44
+ EXTRAVERSION =
+ NAME = Diseased Newt
+
+diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
+index 88635b301694..69608a4f554b 100644
+--- a/arch/x86/kernel/cpu/common.c
++++ b/arch/x86/kernel/cpu/common.c
+@@ -291,10 +291,9 @@ __setup("nosmap", setup_disable_smap);
+
+ static __always_inline void setup_smap(struct cpuinfo_x86 *c)
+ {
+- unsigned long eflags;
++ unsigned long eflags = native_save_fl();
+
+ /* This should have been cleared long ago */
+- raw_local_save_flags(eflags);
+ BUG_ON(eflags & X86_EFLAGS_AC);
+
+ if (cpu_has(c, X86_FEATURE_SMAP)) {
+diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
+index dfe835d21b15..0fa8fd9adeba 100644
+--- a/drivers/usb/host/xhci-hub.c
++++ b/drivers/usb/host/xhci-hub.c
+@@ -619,8 +619,30 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd,
+ if ((raw_port_status & PORT_RESET) ||
+ !(raw_port_status & PORT_PE))
+ return 0xffffffff;
+- if (time_after_eq(jiffies,
+- bus_state->resume_done[wIndex])) {
++ /* did port event handler already start resume timing? */
++ if (!bus_state->resume_done[wIndex]) {
++ /* If not, maybe we are in a host initated resume? */
++ if (test_bit(wIndex, &bus_state->resuming_ports)) {
++ /* Host initated resume doesn't time the resume
++ * signalling using resume_done[].
++ * It manually sets RESUME state, sleeps 20ms
++ * and sets U0 state. This should probably be
++ * changed, but not right now.
++ */
++ } else {
++ /* port resume was discovered now and here,
++ * start resume timing
++ */
++ unsigned long timeout = jiffies +
++ msecs_to_jiffies(USB_RESUME_TIMEOUT);
++
++ set_bit(wIndex, &bus_state->resuming_ports);
++ bus_state->resume_done[wIndex] = timeout;
++ mod_timer(&hcd->rh_timer, timeout);
++ }
++ /* Has resume been signalled for USB_RESUME_TIME yet? */
++ } else if (time_after_eq(jiffies,
++ bus_state->resume_done[wIndex])) {
+ int time_left;
+
+ xhci_dbg(xhci, "Resume USB2 port %d\n",
+@@ -661,13 +683,24 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd,
+ } else {
+ /*
+ * The resume has been signaling for less than
+- * 20ms. Report the port status as SUSPEND,
+- * let the usbcore check port status again
+- * and clear resume signaling later.
++ * USB_RESUME_TIME. Report the port status as SUSPEND,
++ * let the usbcore check port status again and clear
++ * resume signaling later.
+ */
+ status |= USB_PORT_STAT_SUSPEND;
+ }
+ }
++ /*
++ * Clear stale usb2 resume signalling variables in case port changed
++ * state during resume signalling. For example on error
++ */
++ if ((bus_state->resume_done[wIndex] ||
++ test_bit(wIndex, &bus_state->resuming_ports)) &&
++ (raw_port_status & PORT_PLS_MASK) != XDEV_U3 &&
++ (raw_port_status & PORT_PLS_MASK) != XDEV_RESUME) {
++ bus_state->resume_done[wIndex] = 0;
++ clear_bit(wIndex, &bus_state->resuming_ports);
++ }
+ if ((raw_port_status & PORT_PLS_MASK) == XDEV_U0
+ && (raw_port_status & PORT_POWER)
+ && (bus_state->suspended_ports & (1 << wIndex))) {
+@@ -998,6 +1031,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+ if ((temp & PORT_PE) == 0)
+ goto error;
+
++ set_bit(wIndex, &bus_state->resuming_ports);
+ xhci_set_link_state(xhci, port_array, wIndex,
+ XDEV_RESUME);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+@@ -1005,6 +1039,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+ spin_lock_irqsave(&xhci->lock, flags);
+ xhci_set_link_state(xhci, port_array, wIndex,
+ XDEV_U0);
++ clear_bit(wIndex, &bus_state->resuming_ports);
+ }
+ bus_state->port_c_suspend |= 1 << wIndex;
+
+diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
+index c15dbffe660b..cd88034c7a83 100644
+--- a/drivers/usb/host/xhci-ring.c
++++ b/drivers/usb/host/xhci-ring.c
+@@ -1595,7 +1595,8 @@ static void handle_port_status(struct xhci_hcd *xhci,
+ */
+ bogus_port_status = true;
+ goto cleanup;
+- } else {
++ } else if (!test_bit(faked_port_index,
++ &bus_state->resuming_ports)) {
+ xhci_dbg(xhci, "resume HS port %d\n", port_id);
+ bus_state->resume_done[faked_port_index] = jiffies +
+ msecs_to_jiffies(USB_RESUME_TIMEOUT);
+diff --git a/include/linux/mm.h b/include/linux/mm.h
+index 9eef3a1f2291..db853dee1ec5 100644
+--- a/include/linux/mm.h
++++ b/include/linux/mm.h
+@@ -2029,6 +2029,7 @@ static inline struct page *follow_page(struct vm_area_struct *vma,
+ #define FOLL_NUMA 0x200 /* force NUMA hinting page fault */
+ #define FOLL_MIGRATION 0x400 /* wait for page to replace migration entry */
+ #define FOLL_TRIED 0x800 /* a retry, previous pass started an IO */
++#define FOLL_COW 0x4000 /* internal GUP flag */
+
+ typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
+ void *data);
+diff --git a/mm/gup.c b/mm/gup.c
+index 377a5a796242..3cec4df06e6b 100644
+--- a/mm/gup.c
++++ b/mm/gup.c
+@@ -32,6 +32,16 @@ static struct page *no_page_table(struct vm_area_struct *vma,
+ return NULL;
+ }
+
++/*
++ * FOLL_FORCE can write to even unwritable pte's, but only
++ * after we've gone through a COW cycle and they are dirty.
++ */
++static inline bool can_follow_write_pte(pte_t pte, unsigned int flags)
++{
++ return pte_write(pte) ||
++ ((flags & FOLL_FORCE) && (flags & FOLL_COW) && pte_dirty(pte));
++}
++
+ static struct page *follow_page_pte(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmd, unsigned int flags)
+ {
+@@ -66,7 +76,7 @@ retry:
+ }
+ if ((flags & FOLL_NUMA) && pte_numa(pte))
+ goto no_page;
+- if ((flags & FOLL_WRITE) && !pte_write(pte)) {
++ if ((flags & FOLL_WRITE) && !can_follow_write_pte(pte, flags)) {
+ pte_unmap_unlock(ptep, ptl);
+ return NULL;
+ }
+@@ -315,7 +325,7 @@ static int faultin_page(struct task_struct *tsk, struct vm_area_struct *vma,
+ * reCOWed by userspace write).
+ */
+ if ((ret & VM_FAULT_WRITE) && !(vma->vm_flags & VM_WRITE))
+- *flags &= ~FOLL_WRITE;
++ *flags |= FOLL_COW;
+ return 0;
+ }
+