kernel.git/arch/s390/lib, branch linux-6.4.y

s390/lib: use SYM* macros instead of ENTRY(), etc.

2023-04-19T15:24:16Z

Consistently use the SYM* family of macros instead of the deprecated ENTRY(), ENDPROC(), etc. family of macros. Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/kasan: remove override of mem*() functions

2023-04-19T15:24:16Z

The kasan mem*() functions are not used anymore since s390 has switched to GENERIC_ENTRY and commit 69d4c0d32186 ("entry, kasan, x86: Disallow overriding mem*() functions"). Therefore remove the now dead code, similar to x86. While at it also use the SYM* macros in mem.S. Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/uaccess: remove extra blank line

2023-04-04T16:27:24Z

In order to get uaccess.c (nearly) checkpatch warning free remove an extra blank line: CHECK: Blank lines aren't necessary before a close brace '}' + +} Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/uaccess: get rid of not needed local variable

2023-04-04T16:27:24Z

Get rid of the not needed val local variable and pass the constant value directly as operand value. In addition this turns the val operand into an input operand, since it is not changed within the inline assemblies. This in turn requires also to add the earlyclobber contraint modifier to all output operands, since the (former) val operand is used after all output variants have been modified. The usercopy kunit tests still pass after this change. Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/uaccess: rename tmp1 and tmp2 variables

2023-04-04T16:27:24Z

Rename tmp1 and tmp2 variables to more meaningful val (for value) and rem (for remainder). Except for debug sections the output of "objdump -Dr" of the uaccess object file is identical before/after this change. Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/uaccess: sort EX_TABLE list for inline assemblies

2023-04-04T16:27:24Z

Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/uaccess: rename/sort labels in inline assemblies

2023-04-04T16:27:24Z

Rename and sort labels in uaccess inline assemblies to increase readability. In addition have only one EX_TABLE entry per line - also to increase readability. Except for debug sections the output of "objdump -Dr" of the uaccess object file is identical before/after this change. Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/uaccess: remove unused label in inline assemblies

2023-04-04T16:27:24Z

Remove an unused label in all three uaccess inline assemblies. Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/uaccess: use symbolic names for inline assembly operands

2023-04-04T16:27:24Z

Improve readability of the uaccess inline assemblies by using symbolic names for all input and output operands. Except for debug sections the output of "objdump -Dr" of the uaccess object file is identical before/after this change. Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/uaccess: add missing earlyclobber annotations to __clear_user()

2023-03-27T15:23:08Z

Add missing earlyclobber annotation to size, to, and tmp2 operands of the __clear_user() inline assembly since they are modified or written to before the last usage of all input operands. This can lead to incorrect register allocation for the inline assembly. Fixes: 6c2a9e6df604 ("[S390] Use alternative user-copy operations for new hardware.") Reported-by: Mark Rutland Link: https://lore.kernel.org/all/20230321122514.1743889-3-mark.rutland@arm.com/ Cc: stable@vger.kernel.org Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik