kernel/arch/sparc/lib/Memcpy_utils.S, branch linux-rolling-stable

sparc: fix accurate exception reporting in copy_{from,to}_user for M7

2025-10-15T10:04:03Z

[ Upstream commit 936fb512752af349fc30ccbe0afe14a2ae6d7159 ] The referenced commit introduced exception handlers on user-space memory references in copy_from_user and copy_to_user. These handlers return from the respective function and calculate the remaining bytes left to copy using the current register contents. This commit fixes a couple of bad calculations. This will fix the return value of copy_from_user and copy_to_user in the faulting case. The behaviour of memcpy stays unchanged. Fixes: 34060b8fffa7 ("arch/sparc: Add accurate exception reporting in M7memcpy") Tested-by: John Paul Adrian Glaubitz # on Oracle SPARC S7 Tested-by: Tony Rodriguez # S7, see https://lore.kernel.org/r/98564e2e68df2dda0e00c67a75c7f7dfedb33c7e.camel@physik.fu-berlin.de Signed-off-by: Michael Karcher Reviewed-by: Andreas Larsson Link: https://lore.kernel.org/r/20250905-memcpy_series-v4-5-1ca72dda195b@mkarcher.dialup.fu-berlin.de Signed-off-by: Andreas Larsson Signed-off-by: Sasha Levin

arch/sparc: Add accurate exception reporting in M7memcpy

2017-08-10T21:59:04Z

Add accurate exception reporting in M7memcpy Signed-off-by: Babu Moger Signed-off-by: David S. Miller

arch/sparc: Rename exception handlers

2017-08-10T21:56:05Z

Rename exception handlers to memcpy_xxx as these are going to be used by new memcpy routines and these handlers are not exclusive to NG4memcpy anymore. Signed-off-by: Babu Moger Signed-off-by: David S. Miller

arch/sparc: Separate the exception handlers from NG4memcpy

2017-08-10T21:55:35Z

Separate the exception handlers from NG4memcpy so that it can be used with new memcpy routines. Make a separate file for all these handlers. Signed-off-by: Babu Moger Signed-off-by: David S. Miller