Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 61 insertions, 20 deletions

diff --git a/lib/gen_crc32table.c b/lib/gen_crc32table.c
index 85d0e412a04..8f8d5439e2d 100644
--- a/lib/gen_crc32table.c
+++ b/lib/gen_crc32table.c
@@ -1,14 +1,29 @@
 #include <stdio.h>
+#include "../include/generated/autoconf.h"
 #include "crc32defs.h"
 #include <inttypes.h>
 
 #define ENTRIES_PER_LINE 4
 
-#define LE_TABLE_SIZE (1 << CRC_LE_BITS)
-#define BE_TABLE_SIZE (1 << CRC_BE_BITS)
+#if CRC_LE_BITS > 8
+# define LE_TABLE_ROWS (CRC_LE_BITS/8)
+# define LE_TABLE_SIZE 256
+#else
+# define LE_TABLE_ROWS 1
+# define LE_TABLE_SIZE (1 << CRC_LE_BITS)
+#endif
 
-static uint32_t crc32table_le[4][LE_TABLE_SIZE];
-static uint32_t crc32table_be[4][BE_TABLE_SIZE];
+#if CRC_BE_BITS > 8
+# define BE_TABLE_ROWS (CRC_BE_BITS/8)
+# define BE_TABLE_SIZE 256
+#else
+# define BE_TABLE_ROWS 1
+# define BE_TABLE_SIZE (1 << CRC_BE_BITS)
+#endif
+
+static uint32_t crc32table_le[LE_TABLE_ROWS][256];
+static uint32_t crc32table_be[BE_TABLE_ROWS][256];
+static uint32_t crc32ctable_le[LE_TABLE_ROWS][256];
 
 /**
  * crc32init_le() - allocate and initialize LE table data
@@ -17,27 +32,38 @@ static uint32_t crc32table_be[4][BE_TABLE_SIZE];
  * fact that crctable[i^j] = crctable[i] ^ crctable[j].
  *
  */
-static void crc32init_le(void)
+static void crc32init_le_generic(const uint32_t polynomial,
+				 uint32_t (*tab)[256])
 {
 	unsigned i, j;
 	uint32_t crc = 1;
 
-	crc32table_le[0][0] = 0;
+	tab[0][0] = 0;
 
-	for (i = 1 << (CRC_LE_BITS - 1); i; i >>= 1) {
-		crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
+	for (i = LE_TABLE_SIZE >> 1; i; i >>= 1) {
+		crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0);
 		for (j = 0; j < LE_TABLE_SIZE; j += 2 * i)
-			crc32table_le[0][i + j] = crc ^ crc32table_le[0][j];
+			tab[0][i + j] = crc ^ tab[0][j];
 	}
 	for (i = 0; i < LE_TABLE_SIZE; i++) {
-		crc = crc32table_le[0][i];
-		for (j = 1; j < 4; j++) {
-			crc = crc32table_le[0][crc & 0xff] ^ (crc >> 8);
-			crc32table_le[j][i] = crc;
+		crc = tab[0][i];
+		for (j = 1; j < LE_TABLE_ROWS; j++) {
+			crc = tab[0][crc & 0xff] ^ (crc >> 8);
+			tab[j][i] = crc;
 		}
 	}
 }
 
+static void crc32init_le(void)
+{
+	crc32init_le_generic(CRCPOLY_LE, crc32table_le);
+}
+
+static void crc32cinit_le(void)
+{
+	crc32init_le_generic(CRC32C_POLY_LE, crc32ctable_le);
+}
+
 /**
  * crc32init_be() - allocate and initialize BE table data
  */
@@ -55,18 +81,18 @@ static void crc32init_be(void)
 	}
 	for (i = 0; i < BE_TABLE_SIZE; i++) {
 		crc = crc32table_be[0][i];
-		for (j = 1; j < 4; j++) {
+		for (j = 1; j < BE_TABLE_ROWS; j++) {
 			crc = crc32table_be[0][(crc >> 24) & 0xff] ^ (crc << 8);
 			crc32table_be[j][i] = crc;
 		}
 	}
 }
 
-static void output_table(uint32_t table[4][256], int len, char *trans)
+static void output_table(uint32_t (*table)[256], int rows, int len, char *trans)
 {
 	int i, j;
 
-	for (j = 0 ; j < 4; j++) {
+	for (j = 0 ; j < rows; j++) {
 		printf("{");
 		for (i = 0; i < len - 1; i++) {
 			if (i % ENTRIES_PER_LINE == 0)
@@ -83,15 +109,30 @@ int main(int argc, char** argv)
 
 	if (CRC_LE_BITS > 1) {
 		crc32init_le();
-		printf("static const u32 crc32table_le[4][256] = {");
-		output_table(crc32table_le, LE_TABLE_SIZE, "tole");
+		printf("static const u32 __cacheline_aligned "
+		       "crc32table_le[%d][%d] = {",
+		       LE_TABLE_ROWS, LE_TABLE_SIZE);
+		output_table(crc32table_le, LE_TABLE_ROWS,
+			     LE_TABLE_SIZE, "tole");
 		printf("};\n");
 	}
 
 	if (CRC_BE_BITS > 1) {
 		crc32init_be();
-		printf("static const u32 crc32table_be[4][256] = {");
-		output_table(crc32table_be, BE_TABLE_SIZE, "tobe");
+		printf("static const u32 __cacheline_aligned "
+		       "crc32table_be[%d][%d] = {",
+		       BE_TABLE_ROWS, BE_TABLE_SIZE);
+		output_table(crc32table_be, LE_TABLE_ROWS,
+			     BE_TABLE_SIZE, "tobe");
+		printf("};\n");
+	}
+	if (CRC_LE_BITS > 1) {
+		crc32cinit_le();
+		printf("static const u32 __cacheline_aligned "
+		       "crc32ctable_le[%d][%d] = {",
+		       LE_TABLE_ROWS, LE_TABLE_SIZE);
+		output_table(crc32ctable_le, LE_TABLE_ROWS,
+			     LE_TABLE_SIZE, "tole");
 		printf("};\n");
 	}