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https://github.com/dynup/kpatch
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0c96fd0968
new-function test fails on ppc64le with the following message:
create-diff-object: ERROR: n_tty.o: kpatch_no_sibling_calls_ppc64le: 3445: Found an unsupported sibling call at n_tty_write()+0x20. Add __attribute__((optimize("-fno-optimize-sibling-calls"))) to n_tty_write() definition.
Add the suggested attribute, as was done for rhel-7.[5-7] versions of
the test.
Signed-off-by: Julien Thierry <jthierry@redhat.com>
27 lines
945 B
Diff
27 lines
945 B
Diff
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
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index 3ad4602..f3cda7e 100644
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--- a/drivers/tty/n_tty.c
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+++ b/drivers/tty/n_tty.c
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@@ -2296,7 +2296,7 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
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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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@@ -2383,6 +2383,12 @@ static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
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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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