tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
microblaze: Use delay slot in __strnlen_user, __strncpy_user
Use delay slot to speedup if maxlen is zero.
Signed-off-by: Michal Simek <monstr@monstr.eu>
+2
-2
+2
-2
arch/microblaze/lib/uaccess_old.S
+2
-2
arch/microblaze/lib/uaccess_old.S
···
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* r3 - temp count
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* r4 - temp val
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*/
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+
beqid r7,3f
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addik r3,r7,0 /* temp_count = len */
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-
beqi r3,3f
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1:
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lbu r4,r6,r0
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sb r4,r5,r0
···
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.type __strnlen_user, @function
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.align 4;
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__strnlen_user:
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+
beqid r6,3f
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addik r3,r6,0
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-
beqi r3,3f
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1:
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lbu r4,r5,r0
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beqid r4,2f /* break on NUL */