Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
unwind: Simplify unwind_user_next_fp() alignment check
2^log_2(n) == n
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://patch.msgid.link/20250924080119.497867836@infradead.org
+1
-3
+1
-3
kernel/unwind/user.c
+1
-3
kernel/unwind/user.c
···
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{
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const struct unwind_user_frame *frame = &fp_frame;
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unsigned long cfa, fp, ra;
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-
unsigned int shift;
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if (frame->use_fp) {
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if (state->fp < state->sp)
···
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return -EINVAL;
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/* Make sure that the address is word aligned */
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-
shift = sizeof(long) == 4 ? 2 : 3;
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if (cfa & ((1 << shift) - 1))
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+
if (cfa & (sizeof(long) - 1))
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return -EINVAL;
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/* Find the Return Address (RA) */