From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Lee Jones <lee.jones@linaro.org>
Subject: [PATCH 4.9 08/32] futex: Split futex_mm_release() for exit/exec
Date: Tue, 2 Feb 2021 14:38:31 +0100 [thread overview]
Message-ID: <20210202132942.364447571@linuxfoundation.org> (raw)
In-Reply-To: <20210202132942.035179752@linuxfoundation.org>
From: Thomas Gleixner <tglx@linutronix.de>
commit 150d71584b12809144b8145b817e83b81158ae5f upstream.
To allow separate handling of the futex exit state in the futex exit code
for exit and exec, split futex_mm_release() into two functions and invoke
them from the corresponding exit/exec_mm_release() callsites.
Preparatory only, no functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.332094221@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/linux/futex.h | 6 ++++--
kernel/fork.c | 5 ++---
kernel/futex.c | 7 ++++++-
3 files changed, 12 insertions(+), 6 deletions(-)
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -98,13 +98,15 @@ static inline void futex_exit_done(struc
tsk->futex_state = FUTEX_STATE_DEAD;
}
-void futex_mm_release(struct task_struct *tsk);
+void futex_exit_release(struct task_struct *tsk);
+void futex_exec_release(struct task_struct *tsk);
long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
u32 __user *uaddr2, u32 val2, u32 val3);
#else
static inline void futex_init_task(struct task_struct *tsk) { }
-static inline void futex_mm_release(struct task_struct *tsk) { }
static inline void futex_exit_done(struct task_struct *tsk) { }
+static inline void futex_exit_release(struct task_struct *tsk) { }
+static inline void futex_exec_release(struct task_struct *tsk) { }
#endif
#endif
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1084,9 +1084,6 @@ static int wait_for_vfork_done(struct ta
*/
static void mm_release(struct task_struct *tsk, struct mm_struct *mm)
{
- /* Get rid of any futexes when releasing the mm */
- futex_mm_release(tsk);
-
uprobe_free_utask(tsk);
/* Get rid of any cached register state */
@@ -1121,11 +1118,13 @@ static void mm_release(struct task_struc
void exit_mm_release(struct task_struct *tsk, struct mm_struct *mm)
{
+ futex_exit_release(tsk);
mm_release(tsk, mm);
}
void exec_mm_release(struct task_struct *tsk, struct mm_struct *mm)
{
+ futex_exec_release(tsk);
mm_release(tsk, mm);
}
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -3269,7 +3269,7 @@ static void exit_robust_list(struct task
curr, pip);
}
-void futex_mm_release(struct task_struct *tsk)
+void futex_exec_release(struct task_struct *tsk)
{
if (unlikely(tsk->robust_list)) {
exit_robust_list(tsk);
@@ -3287,6 +3287,11 @@ void futex_mm_release(struct task_struct
exit_pi_state_list(tsk);
}
+void futex_exit_release(struct task_struct *tsk)
+{
+ futex_exec_release(tsk);
+}
+
long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
u32 __user *uaddr2, u32 val2, u32 val3)
{
next prev parent reply other threads:[~2021-02-02 17:54 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-02 13:38 [PATCH 4.9 00/32] 4.9.255-rc1 review Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 01/32] ACPI: sysfs: Prefer "compatible" modalias Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 02/32] wext: fix NULL-ptr-dereference with cfg80211s lack of commit() Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 03/32] net: usb: qmi_wwan: added support for Thales Cinterion PLSx3 modem family Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 04/32] y2038: futex: Move compat implementation into futex.c Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 05/32] futex: Move futex exit handling into futex code Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 06/32] futex: Replace PF_EXITPIDONE with a state Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 07/32] exit/exec: Seperate mm_release() Greg Kroah-Hartman
2021-02-02 13:38 ` Greg Kroah-Hartman [this message]
2021-02-02 13:38 ` [PATCH 4.9 09/32] futex: Set task::futex_state to DEAD right after handling futex exit Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 10/32] futex: Mark the begin of futex exit explicitly Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 11/32] futex: Sanitize exit state handling Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 12/32] futex: Provide state handling for exec() as well Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 13/32] futex: Add mutex around futex exit Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 14/32] futex: Provide distinct return value when owner is exiting Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 15/32] futex: Prevent exit livelock Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 16/32] KVM: x86/pmu: Fix HW_REF_CPU_CYCLES event pseudo-encoding in intel_arch_events[] Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 17/32] KVM: x86: get smi pending status correctly Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 18/32] leds: trigger: fix potential deadlock with libata Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 19/32] mt7601u: fix kernel crash unplugging the device Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 20/32] mt7601u: fix rx buffer refcounting Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 21/32] ARM: imx: build suspend-imx6.S with arm instruction set Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 22/32] netfilter: nft_dynset: add timeout extension to template Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 23/32] xfrm: Fix oops in xfrm_replay_advance_bmp Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 24/32] RDMA/cxgb4: Fix the reported max_recv_sge value Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 25/32] iwlwifi: pcie: use jiffies for memory read spin time limit Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 26/32] iwlwifi: pcie: reschedule in long-running memory reads Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 27/32] mac80211: pause TX while changing interface type Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 28/32] can: dev: prevent potential information leak in can_fill_info() Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 29/32] iommu/vt-d: Gracefully handle DMAR units with no supported address widths Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 30/32] iommu/vt-d: Dont dereference iommu_device if IOMMU_API is not built Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 31/32] NFC: fix resource leak when target index is invalid Greg Kroah-Hartman
2021-02-02 13:38 ` [PATCH 4.9 32/32] NFC: fix possible resource leak Greg Kroah-Hartman
2021-02-02 20:20 ` [PATCH 4.9 00/32] 4.9.255-rc1 review Jon Hunter
2021-02-03 9:53 ` Naresh Kamboju
2021-02-03 15:42 ` Shuah Khan
2021-02-03 20:41 ` Guenter Roeck
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