From dd05add7b2b6004c5fa3a1f276f56d8668f86b65 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Sat, 26 Sep 2026 19:20:30 -0300 Subject: netfs: zero the tail of a short DIO/unbuffered read The buffered read collector zero-fills the tail of a short read that stops below the inode's i_size (netfs_clear_unread()), so a read that races an extending write still returns the expected number of bytes. The non-buffered collector path does no such thing: it just records how much was transferred. Add the same zero-fill for the non-buffered case, gated on NETFS_SREQ_CLEAR_TAIL: a subreq's source sets that flag when a short result from it is known to be safe to treat as a hole, as opposed to NETFS_SREQ_HIT_EOF, which means the read genuinely ran off the end of the file and should be reported short as-is. Only CLEAR_TAIL should zero-fill here; a real EOF must stay a real short read. No source currently sets CLEAR_TAIL on an unbuffered/DIO subrequest, so this is inert on its own -- a following change teaches cifs to set it in the one case that needs it. Fixes: e2d46f2ec332 ("netfs: Change the read result collector to only use one work item") Reviewed-by: David Howells Reviewed-by: Namjae Jeon Signed-off-by: Paulo Alcantara Cc: Christian Brauner Cc: Matthew Wilcox Cc: Ronnie Sahlberg Cc: Shyam Prasad N Cc: Tom Talpey Cc: Bharath SM Cc: stable@vger.kernel.org --- drivers/tty/Makefile | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 drivers/tty/Makefile (limited to 'drivers/tty/Makefile') diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile new file mode 100644 index 000000000..c6a063a54 --- /dev/null +++ b/drivers/tty/Makefile @@ -0,0 +1,28 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_TTY) += tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o \ + tty_buffer.o tty_port.o tty_mutex.o \ + tty_ldsem.o tty_baudrate.o tty_jobctrl.o \ + n_null.o +obj-$(CONFIG_LEGACY_PTYS) += pty.o +obj-$(CONFIG_UNIX98_PTYS) += pty.o +obj-$(CONFIG_AUDIT) += tty_audit.o +obj-$(CONFIG_MAGIC_SYSRQ) += sysrq.o +obj-$(CONFIG_N_HDLC) += n_hdlc.o +obj-$(CONFIG_N_GSM) += n_gsm.o + +obj-y += vt/ +obj-$(CONFIG_HVC_DRIVER) += hvc/ +obj-y += serial/ +obj-$(CONFIG_SERIAL_DEV_BUS) += serdev/ + +# tty drivers +obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o +obj-$(CONFIG_MOXA_INTELLIO) += moxa.o +obj-$(CONFIG_MOXA_SMARTIO) += mxser.o +obj-$(CONFIG_NOZOMI) += nozomi.o +obj-$(CONFIG_NULL_TTY) += ttynull.o +obj-$(CONFIG_PPC_EPAPR_HV_BYTECHAN) += ehv_bytechan.o +obj-$(CONFIG_GOLDFISH_TTY) += goldfish.o +obj-$(CONFIG_MIPS_EJTAG_FDC_TTY) += mips_ejtag_fdc.o +obj-$(CONFIG_VCC) += vcc.o +obj-$(CONFIG_RPMSG_TTY) += rpmsg_tty.o -- cgit v1.3.1