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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
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parent
7a7d744ffe
commit
e448e1e774
3 changed files with 4 additions and 3 deletions
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@ -413,6 +413,8 @@ extern int fix_alignment(struct pt_regs *);
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#define NET_IP_ALIGN 0
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#endif
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int do_mathemu(struct pt_regs *regs);
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#endif /* __KERNEL__ */
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_POWERPC_PROCESSOR_H */
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@ -1405,7 +1405,6 @@ int is_valid_bugaddr(unsigned long addr)
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static int emulate_math(struct pt_regs *regs)
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{
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int ret;
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extern int do_mathemu(struct pt_regs *regs);
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ret = do_mathemu(regs);
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if (ret >= 0)
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@ -225,7 +225,7 @@ record_exception(struct pt_regs *regs, int eflag)
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int
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do_mathemu(struct pt_regs *regs)
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{
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void *op0 = 0, *op1 = 0, *op2 = 0, *op3 = 0;
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void *op0 = NULL, *op1 = NULL, *op2 = NULL, *op3 = NULL;
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unsigned long pc = regs->nip;
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signed short sdisp;
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u32 insn = 0;
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@ -234,7 +234,7 @@ do_mathemu(struct pt_regs *regs)
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int type = 0;
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int eflag, trap;
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if (get_user(insn, (u32 *)pc))
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if (get_user(insn, (u32 __user *)pc))
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return -EFAULT;
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switch (insn >> 26) {
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