string: factorize skip_spaces and export it to be generally available

[safe/jmp/linux-2.6] / include / linux / ata.h

diff --git a/include/linux/ata.h b/include/linux/ata.h
index e2595e8..38a6948 100644 (file)
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -75,6 +75,7 @@ enum {
        ATA_ID_EIDE_DMA_TIME    = 66,
        ATA_ID_EIDE_PIO         = 67,
        ATA_ID_EIDE_PIO_IORDY   = 68,
+       ATA_ID_ADDITIONAL_SUPP  = 69,
        ATA_ID_QUEUE_DEPTH      = 75,
        ATA_ID_MAJOR_VER        = 80,
        ATA_ID_COMMAND_SET_1    = 82,
@@ -816,6 +817,16 @@ static inline int ata_id_has_trim(const u16 *id)
        return 0;
 }
 
+static inline int ata_id_has_zero_after_trim(const u16 *id)
+{
+       /* DSM supported, deterministic read, and read zero after trim set */
+       if (ata_id_has_trim(id) &&
+           (id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
+               return 1;
+
+       return 0;
+}
+
 static inline int ata_id_current_chs_valid(const u16 *id)
 {
        /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
@@ -971,17 +982,17 @@ static inline void ata_id_to_hd_driveid(u16 *id)
 }
 
 /*
- * Write up to 'max' LBA Range Entries to the buffer that will cover the
- * extent from sector to sector + count.  This is used for TRIM and for
- * ADD LBA(S) TO NV CACHE PINNED SET.
+ * Write LBA Range Entries to the buffer that will cover the extent from
+ * sector to sector + count.  This is used for TRIM and for ADD LBA(S)
+ * TO NV CACHE PINNED SET.
  */
-static inline unsigned ata_set_lba_range_entries(void *_buffer, unsigned max,
-                                               u64 sector, unsigned long count)
+static inline unsigned ata_set_lba_range_entries(void *_buffer,
+               unsigned buf_size, u64 sector, unsigned long count)
 {
        __le64 *buffer = _buffer;
-       unsigned i = 0;
+       unsigned i = 0, used_bytes;
 
-       while (i < max) {
+       while (i < buf_size / 8 ) { /* 6-byte LBA + 2-byte range per entry */
                u64 entry = sector |
                        ((u64)(count > 0xffff ? 0xffff : count) << 48);
                buffer[i++] = __cpu_to_le64(entry);
@@ -991,9 +1002,9 @@ static inline unsigned ata_set_lba_range_entries(void *_buffer, unsigned max,
                sector += 0xffff;
        }
 
-       max = ALIGN(i * 8, 512);
-       memset(buffer + i, 0, max - i * 8);
-       return max;
+       used_bytes = ALIGN(i * 8, 512);
+       memset(buffer + i, 0, used_bytes - i * 8);
+       return used_bytes;
 }
 
 static inline int is_multi_taskfile(struct ata_taskfile *tf)