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(parent: 13e4bf1) | patch
x86/usercopy: Remove .fixup usage
authorPeter Zijlstra <peterz@infradead.org>
Wed, 10 Nov 2021 10:01:22 +0000 (11:01 +0100)
committerPeter Zijlstra <peterz@infradead.org>
Sat, 11 Dec 2021 08:09:50 +0000 (09:09 +0100)
commitd5d797dcbd781cb7c526ad32f31c7fd96babfdb2
treedd64239b122e8ab932f750b121d88bdacbff9120tree | snapshot
parent13e4bf1bddcb65dd028aaa492789e8d61efaafa1commit | diff
x86/usercopy: Remove .fixup usage

Typically usercopy does whole word copies followed by a number of byte
copies to finish the tail. This means that on exception it needs to
compute the remaining length as: words*sizeof(long) + bytes.

Create a new extable handler to do just this.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20211110101326.081701085@infradead.org
arch/x86/include/asm/extable_fixup_types.h diff | blob | history
arch/x86/lib/usercopy_32.c diff | blob | history
arch/x86/lib/usercopy_64.c diff | blob | history
arch/x86/mm/extable.c diff | blob | history
Domain: System / Kernel;