mirror of
https://github.com/dynup/kpatch
synced 2025-04-27 13:37:57 +00:00
dc1d49a142
* gcc-constprop.patch
In v4.20, 33e26418193f ("y2038: make do_gettimeofday() and get_seconds()
inline"), do_gettimeofdat() no longer exists as a stand alone function
in kernel/time/timekeeping.c.
* gcc-static-local-var-4.patch
Unlike on rhel-8.4, _always_inline put_aio_ring_file() is causing too
many inlines and results in modified, but not ftrace-able,
__do_sys_io_submit() and __do_sys_io_setup(). Remove the annotation
from this function.
* module.patch
In v4.20, 9ceddd9da134 ("knfsd: Allow lockless lookups of the exports"),
the nfs_exports_op seq_operations converted to RCU protected lookups.
Calling yield() from a kpatched e_show() results in a kernel warning,
"Voluntary context switch within RCU read-side critical section!"
Substitute with single_task_running(), which does not context switch or
have any other side effects.
In v5.10, ec6347bb4339 ("x86, powerpc: Rename memcpy_mcsafe() to
copy_mc_to_{user, kernel}()") did away with the mcsafe_key. Use
another exported static key like context_tracking_enabled.
In v5.13, a0e2bf7cb700 ("x86/paravirt: Switch time pvops functions to
use static_call()"), paravirt_sched_clock() was converted from a
paravirt call to a non-exported static call. Update the x86 code to
instead call __flush_tlb_local() (which is still a paravirt call).
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
26 lines
894 B
Diff
26 lines
894 B
Diff
diff -Nupr src.orig/drivers/tty/n_tty.c src/drivers/tty/n_tty.c
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--- src.orig/drivers/tty/n_tty.c 2022-04-29 15:52:13.274335318 -0400
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+++ src/drivers/tty/n_tty.c 2022-04-29 15:53:04.777518603 -0400
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@@ -2253,7 +2253,7 @@ more_to_be_read:
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* lock themselves)
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*/
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-static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
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+static ssize_t noinline kpatch_n_tty_write(struct tty_struct *tty, struct file *file,
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const unsigned char *buf, size_t nr)
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{
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const unsigned char *b = buf;
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@@ -2340,6 +2340,12 @@ break_out:
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return (b - buf) ? b - buf : retval;
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}
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+static ssize_t __attribute__((optimize("-fno-optimize-sibling-calls"))) n_tty_write(struct tty_struct *tty, struct file *file,
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+ const unsigned char *buf, size_t nr)
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+{
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+ return kpatch_n_tty_write(tty, file, buf, nr);
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+}
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+
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/**
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* n_tty_poll - poll method for N_TTY
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* @tty: terminal device
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