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| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /drivers/usb/class/Kconfig | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'drivers/usb/class/Kconfig')
| -rw-r--r-- | drivers/usb/class/Kconfig | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/usb/class/Kconfig b/drivers/usb/class/Kconfig new file mode 100644 index 000000000..d3f5162bd --- /dev/null +++ b/drivers/usb/class/Kconfig @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# USB Class driver configuration +# +comment "USB Device Class drivers" + +config USB_ACM + tristate "USB Modem (CDC ACM) support" + depends on TTY + help + This driver supports USB modems and ISDN adapters which support the + Communication Device Class Abstract Control Model interface. + Please read <file:Documentation/usb/acm.rst> for details. + + If your modem only reports "Cls=ff(vend.)" in the descriptors in + /sys/kernel/debug/usb/devices, then your modem will not work with this + driver. + + To compile this driver as a module, choose M here: the + module will be called cdc-acm. + +config USB_PRINTER + tristate "USB Printer support" + help + Say Y here if you want to connect a USB printer to your computer's + USB port. + + To compile this driver as a module, choose M here: the + module will be called usblp. + +config USB_WDM + tristate "USB Wireless Device Management support" + help + This driver supports the WMC Device Management functionality + of cell phones compliant to the CDC WMC specification. You can use + AT commands over this device. + + To compile this driver as a module, choose M here: the + module will be called cdc-wdm. + +config USB_TMC + tristate "USB Test and Measurement Class support" + help + Say Y here if you want to connect a USB device that follows + the USB.org specification for USB Test and Measurement devices + to your computer's USB port. + + To compile this driver as a module, choose M here: the + module will be called usbtmc. |