powerpc/math: Fix missing __user qualifier for get_user() and other sparse warnings

Sparse reports the following problems:

arch/powerpc/math-emu/math.c:228:21: warning: Using plain integer as NULL pointer
arch/powerpc/math-emu/math.c:228:31: warning: Using plain integer as NULL pointer
arch/powerpc/math-emu/math.c:228:41: warning: Using plain integer as NULL pointer
arch/powerpc/math-emu/math.c:228:51: warning: Using plain integer as NULL pointer
arch/powerpc/math-emu/math.c:237:13: warning: incorrect type in initializer (different address spaces)
arch/powerpc/math-emu/math.c:237:13:    expected unsigned int [noderef] __user *_gu_addr
arch/powerpc/math-emu/math.c:237:13:    got unsigned int [usertype] *
arch/powerpc/math-emu/math.c:226:1: warning: symbol 'do_mathemu' was not declared. Should it be static?

Add missing __user qualifier when casting pointer used in get_user()

Use NULL instead of 0 to initialise opX local variables.

Add a prototype for do_mathemu() (Added in processor.h like sparc)

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e4d1aae7604d89c98a52dfd8ce8443462e595670.1615809591.git.christophe.leroy@csgroup.eu

This commit is contained in:

Christophe Leroy

2021-03-15 12:00:09 +00:00

committed by

Michael Ellerman

parent 7a7d744ffe

commit e448e1e774

3 changed files with 4 additions and 3 deletions

									
										arch/powerpc/include/asm/processor.h
									
		+2
		
												View File
												
				@@ -413,6 +413,8 @@ extern int fix_alignment(struct pt_regs *);

				#define NET_IP_ALIGN	0

				#endif

				int do_mathemu(struct pt_regs *regs);

				#endif /* __KERNEL__ */

				#endif /* __ASSEMBLY__ */

				#endif /* _ASM_POWERPC_PROCESSOR_H */