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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-08-18 17:19:33 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-04 01:01:14 +1100 |
| commit | de781ebdf6b8a256742da4fd6b0e39bb22ed9fe3 (patch) | |
| tree | c9592674a2b48a45cfa3386ecac9d6cf9d9c9215 /scripts/dtc/Makefile | |
| parent | 14026b94ccfe626e512bc9fa01e0e72ee75c7a98 (diff) | |
powerpc/signal32: Add and use unsafe_put_sigset_t()
put_sigset_t() calls copy_to_user() for copying two words.
This is terribly inefficient for copying two words.
By switching to unsafe_put_user(), we end up with something as
simple as:
3cc: 81 3d 00 00 lwz r9,0(r29)
3d0: 91 26 00 b4 stw r9,180(r6)
3d4: 81 3d 00 04 lwz r9,4(r29)
3d8: 91 26 00 b8 stw r9,184(r6)
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/06def97e87ac1c4ae8e3197e0982e1fab7b3c8ae.1597770847.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'scripts/dtc/Makefile')
0 files changed, 0 insertions, 0 deletions