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https://github.com/dynup/kpatch
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0e57bb0236
Now that sibling calls aren't supported in ppc64le, change the RHEL 7.5 and 7.6 versions of the new-function tests to disable the sibling call optimization. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
26 lines
878 B
Diff
26 lines
878 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 2017-09-22 15:27:21.084053633 -0400
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+++ src/drivers/tty/n_tty.c 2017-09-22 15:27:45.888156346 -0400
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@@ -2016,7 +2016,7 @@ do_it_again:
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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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@@ -2098,6 +2098,12 @@ 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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