[PATCH openEuler-5.10 01/92] parisc: math-emu: Fix fall-through warnings

15 Nov 2021

From: Helge Deller deller@gmx.de
stable inclusion
from stable-5.10.76
commit b3b7f831a49b56c258ab8ef08d04045fcfb9b4a7
bugzilla: 182988 https://gitee.com/openeuler/kernel/issues/I4IAHF
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
--------------------------------
commit 6f1fce595b78b775d7fb585c15c2dc3a6994f96e upstream.
Fix lots of fallthrough warnings, e.g.:
arch/parisc/math-emu/fpudispatch.c:323:33: warning: this statement may fall through [-Wimplicit-fallthrough=]
Signed-off-by: Helge Deller deller@gmx.de
Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
Signed-off-by: Chen Jun chenjun102@huawei.com
Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com
---
 arch/parisc/math-emu/fpudispatch.c | 56 ++++++++++++++++++++++++++++--
 1 file changed, 53 insertions(+), 3 deletions(-)

diff --git a/arch/parisc/math-emu/fpudispatch.c b/arch/parisc/math-emu/fpudispatch.c
index 7c46969ead9b..01ed133227c2 100644
--- a/arch/parisc/math-emu/fpudispatch.c
+++ b/arch/parisc/math-emu/fpudispatch.c
@@ -310,12 +310,15 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				r1 &= ~3;
    				fpregs[t+3] = fpregs[r1+3];
    				fpregs[t+2] = fpregs[r1+2];
+					fallthrough;
    			    case 1: /* double */
    				fpregs[t+1] = fpregs[r1+1];
+					fallthrough;
    			    case 0: /* single */
    				fpregs[t] = fpregs[r1];
    				return(NOEXCEPTION);
    			}
+				BUG();
    		case 3: /* FABS */
    			switch (fmt) {
    			    case 2: /* illegal */
@@ -325,13 +328,16 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				r1 &= ~3;
    				fpregs[t+3] = fpregs[r1+3];
    				fpregs[t+2] = fpregs[r1+2];
+					fallthrough;
    			    case 1: /* double */
    				fpregs[t+1] = fpregs[r1+1];
+					fallthrough;
    			    case 0: /* single */
    				/* copy and clear sign bit */
    				fpregs[t] = fpregs[r1] & 0x7fffffff;
    				return(NOEXCEPTION);
    			}
+				BUG();
    		case 6: /* FNEG */
    			switch (fmt) {
    			    case 2: /* illegal */
@@ -341,13 +347,16 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				r1 &= ~3;
    				fpregs[t+3] = fpregs[r1+3];
    				fpregs[t+2] = fpregs[r1+2];
+					fallthrough;
    			    case 1: /* double */
    				fpregs[t+1] = fpregs[r1+1];
+					fallthrough;
    			    case 0: /* single */
    				/* copy and invert sign bit */
    				fpregs[t] = fpregs[r1] ^ 0x80000000;
    				return(NOEXCEPTION);
    			}
+				BUG();
    		case 7: /* FNEGABS */
    			switch (fmt) {
    			    case 2: /* illegal */
@@ -357,13 +366,16 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				r1 &= ~3;
    				fpregs[t+3] = fpregs[r1+3];
    				fpregs[t+2] = fpregs[r1+2];
+					fallthrough;
    			    case 1: /* double */
    				fpregs[t+1] = fpregs[r1+1];
+					fallthrough;
    			    case 0: /* single */
    				/* copy and set sign bit */
    				fpregs[t] = fpregs[r1] | 0x80000000;
    				return(NOEXCEPTION);
    			}
+				BUG();
    		case 4: /* FSQRT */
    			switch (fmt) {
    			    case 0:
@@ -376,6 +388,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3: /* quad not implemented */
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    		case 5: /* FRND */
    			switch (fmt) {
    			    case 0:
@@ -389,7 +402,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				return(MAJOR_0C_EXCP);
    			}
    	} /* end of switch (subop) */
-
+		BUG();
    case 1: /* class 1 */
    	df = extru(ir,fpdfpos,2); /* get dest format */
    	if ((df & 2) || (fmt & 2)) {
@@ -419,6 +432,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3: /* dbl/dbl */
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    		case 1: /* FCNVXF */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -434,6 +448,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				return(dbl_to_dbl_fcnvxf(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 2: /* FCNVFX */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -449,6 +464,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				return(dbl_to_dbl_fcnvfx(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 3: /* FCNVFXT */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -464,6 +480,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				return(dbl_to_dbl_fcnvfxt(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 5: /* FCNVUF (PA2.0 only) */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -479,6 +496,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				return(dbl_to_dbl_fcnvuf(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 6: /* FCNVFU (PA2.0 only) */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -494,6 +512,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				return(dbl_to_dbl_fcnvfu(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 7: /* FCNVFUT (PA2.0 only) */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -509,10 +528,11 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    				return(dbl_to_dbl_fcnvfut(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 4: /* undefined */
    			return(MAJOR_0C_EXCP);
    	} /* end of switch subop */
-
+		BUG();
    case 2: /* class 2 */
    	fpu_type_flags=fpregs[FPU_TYPE_FLAG_POS];
    	r2 = extru(ir, fpr2pos, 5) * sizeof(double)/sizeof(u_int);
@@ -590,6 +610,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3: /* quad not implemented */
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    		case 1: /* FTEST */
    			switch (fmt) {
    			    case 0:
@@ -609,8 +630,10 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3:
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    	    } /* end of switch subop */
    	} /* end of else for PA1.0 & PA1.1 */
+		BUG();
    case 3: /* class 3 */
    	r2 = extru(ir,fpr2pos,5) * sizeof(double)/sizeof(u_int);
    	if (r2 == 0)
@@ -633,6 +656,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3: /* quad not implemented */
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    		case 1: /* FSUB */
    			switch (fmt) {
    			    case 0:
@@ -645,6 +669,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3: /* quad not implemented */
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    		case 2: /* FMPY */
    			switch (fmt) {
    			    case 0:
@@ -657,6 +682,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3: /* quad not implemented */
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    		case 3: /* FDIV */
    			switch (fmt) {
    			    case 0:
@@ -669,6 +695,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3: /* quad not implemented */
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    		case 4: /* FREM */
    			switch (fmt) {
    			    case 0:
@@ -681,6 +708,7 @@ decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
    			    case 3: /* quad not implemented */
    				return(MAJOR_0C_EXCP);
    			}
+				BUG();
    	} /* end of class 3 switch */
    } /* end of switch(class) */
@@ -736,10 +764,12 @@ u_int fpregs[];
    				return(MAJOR_0E_EXCP);
    			    case 1: /* double */
    				fpregs[t+1] = fpregs[r1+1];
+					fallthrough;
    			    case 0: /* single */
    				fpregs[t] = fpregs[r1];
    				return(NOEXCEPTION);
    			}
+				BUG();
    		case 3: /* FABS */
    			switch (fmt) {
    			    case 2:
@@ -747,10 +777,12 @@ u_int fpregs[];
    				return(MAJOR_0E_EXCP);
    			    case 1: /* double */
    				fpregs[t+1] = fpregs[r1+1];
+					fallthrough;
    			    case 0: /* single */
    				fpregs[t] = fpregs[r1] & 0x7fffffff;
    				return(NOEXCEPTION);
    			}
+				BUG();
    		case 6: /* FNEG */
    			switch (fmt) {
    			    case 2:
@@ -758,10 +790,12 @@ u_int fpregs[];
    				return(MAJOR_0E_EXCP);
    			    case 1: /* double */
    				fpregs[t+1] = fpregs[r1+1];
+					fallthrough;
    			    case 0: /* single */
    				fpregs[t] = fpregs[r1] ^ 0x80000000;
    				return(NOEXCEPTION);
    			}
+				BUG();
    		case 7: /* FNEGABS */
    			switch (fmt) {
    			    case 2:
@@ -769,10 +803,12 @@ u_int fpregs[];
    				return(MAJOR_0E_EXCP);
    			    case 1: /* double */
    				fpregs[t+1] = fpregs[r1+1];
+					fallthrough;
    			    case 0: /* single */
    				fpregs[t] = fpregs[r1] | 0x80000000;
    				return(NOEXCEPTION);
    			}
+				BUG();
    		case 4: /* FSQRT */
    			switch (fmt) {
    			    case 0:
@@ -785,6 +821,7 @@ u_int fpregs[];
    			    case 3:
    				return(MAJOR_0E_EXCP);
    			}
+				BUG();
    		case 5: /* FRMD */
    			switch (fmt) {
    			    case 0:
@@ -798,7 +835,7 @@ u_int fpregs[];
    				return(MAJOR_0E_EXCP);
    			}
    	} /* end of switch (subop */
-	
+		BUG();
    case 1: /* class 1 */
    	df = extru(ir,fpdfpos,2); /* get dest format */
    	/*
@@ -826,6 +863,7 @@ u_int fpregs[];
    			    case 3: /* dbl/dbl */
    				return(MAJOR_0E_EXCP);
    			}
+				BUG();
    		case 1: /* FCNVXF */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -841,6 +879,7 @@ u_int fpregs[];
    				return(dbl_to_dbl_fcnvxf(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 2: /* FCNVFX */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -856,6 +895,7 @@ u_int fpregs[];
    				return(dbl_to_dbl_fcnvfx(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 3: /* FCNVFXT */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -871,6 +911,7 @@ u_int fpregs[];
    				return(dbl_to_dbl_fcnvfxt(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 5: /* FCNVUF (PA2.0 only) */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -886,6 +927,7 @@ u_int fpregs[];
    				return(dbl_to_dbl_fcnvuf(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 6: /* FCNVFU (PA2.0 only) */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -901,6 +943,7 @@ u_int fpregs[];
    				return(dbl_to_dbl_fcnvfu(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 7: /* FCNVFUT (PA2.0 only) */
    			switch(fmt) {
    			    case 0: /* sgl/sgl */
@@ -916,9 +959,11 @@ u_int fpregs[];
    				return(dbl_to_dbl_fcnvfut(&fpregs[r1],0,
    					&fpregs[t],status));
    			}
+				BUG();
    		case 4: /* undefined */
    			return(MAJOR_0C_EXCP);
    	} /* end of switch subop */
+		BUG();
    case 2: /* class 2 */
    	/*
    	 * Be careful out there.
@@ -994,6 +1039,7 @@ u_int fpregs[];
    			}
    	    } /* end of switch subop */
    	} /* end of else for PA1.0 & PA1.1 */
+		BUG();
    case 3: /* class 3 */
    	/*
    	 * Be careful out there.
@@ -1026,6 +1072,7 @@ u_int fpregs[];
    				return(dbl_fadd(&fpregs[r1],&fpregs[r2],
    					&fpregs[t],status));
    			}
+				BUG();
    		case 1: /* FSUB */
    			switch (fmt) {
    			    case 0:
@@ -1035,6 +1082,7 @@ u_int fpregs[];
    				return(dbl_fsub(&fpregs[r1],&fpregs[r2],
    					&fpregs[t],status));
    			}
+				BUG();
    		case 2: /* FMPY or XMPYU */
    			/*
    			 * check for integer multiply (x bit set)
@@ -1071,6 +1119,7 @@ u_int fpregs[];
    				       &fpregs[r2],&fpregs[t],status));
    			    }
    			}
+				BUG();
    		case 3: /* FDIV */
    			switch (fmt) {
    			    case 0:
@@ -1080,6 +1129,7 @@ u_int fpregs[];
    				return(dbl_fdiv(&fpregs[r1],&fpregs[r2],
    					&fpregs[t],status));
    			}
+				BUG();
    		case 4: /* FREM */
    			switch (fmt) {
    			    case 0:
-- 
2.20.1

    

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[PATCH openEuler-5.10 01/92] parisc: math-emu: Fix fall-through warnings