From 7253943ae070b253b98430a558e10e4dd1527dbb Mon Sep 17 00:00:00 2001
From: Liu Aleaxander <Aleaxander@gmail.com>
Date: Wed, 24 Jun 2009 06:31:39 +0800
Subject: [PATCH] Core: code clean

removes the unused variables and unused functions
---
 core/diskio.c |  2 --
 core/fs.c     | 46 ++++++++--------------------------------------
 2 files changed, 8 insertions(+), 40 deletions(-)

diff --git a/core/diskio.c b/core/diskio.c
index c1c8dc0..28aac10 100644
--- a/core/diskio.c
+++ b/core/diskio.c
@@ -16,7 +16,6 @@ static int chs_rdwr_sectors(struct disk *disk, void *buf,
     char *ptr = buf;
     char *tptr;
     size_t chunk, freeseg;
-    int sector_size  = disk->sector_size;
     int sector_shift = disk->sector_shift;
     uint32_t xlba = lba;	/* Truncated LBA (CHS is << 2 TB) */
     uint32_t t;
@@ -110,7 +109,6 @@ static int edd_rdwr_sectors(struct disk *disk, void *buf,
     char *ptr = buf;
     char *tptr;
     size_t chunk, freeseg;
-    int sector_size  = disk->sector_size;
     int sector_shift = disk->sector_shift;
     com32sys_t ireg, oreg;
     size_t done = 0;
diff --git a/core/fs.c b/core/fs.c
index 77d0357..3ebc0b1 100644
--- a/core/fs.c
+++ b/core/fs.c
@@ -74,33 +74,6 @@ void searchdir(com32sys_t *regs)
         regs->eflags.l |= EFLAGS_ZF;
 }
 
-/*
- * well, I find that in the diskstart.inc, there's no room fow us to
- * get the edd check result, so we implement a new one here.
- */
-uint8_t detect_edd(uint8_t device_num)
-{
-    com32sys_t iregs, oregs;
-    
-    /* Sending int 13h func 41h to query EBIOS information */
-    memset(&iregs, 0, sizeof iregs);
-    memset(&oregs, 0, sizeof oregs);
-    
-    /* Get EBIOS support */
-    iregs.eax.w[0] = 0x4100;
-    iregs.ebx.w[0] = 0x55aa;
-    iregs.edx.b[0] = device_num;
-    iregs.eflags.b[0] = 0x3; /* CF set */
-    
-    __intcall(0x13, &iregs, &oregs);
-    
-    /* Detecting EDD support */
-    if (!(oregs.eflags.l & EFLAGS_CF) &&
-        oregs.ebx.w[0] == 0xaa55 && (oregs.ecx.b[0] & 1))
-        return 1;
-    else
-        return 0;
-}
 
 /* 
  * initialize the device structure 
@@ -112,17 +85,14 @@ struct device * device_init(uint8_t devno, bool cdrom, sector_t part_start,
 
     dev.disk = disk_init(devno, cdrom, part_start, bsHeads, bsSecPerTrack);
         
-    /* 
-     * check if we use cache or not, for now I just know ISO fs 
-     * does not use the cache, and I hope the USE_CACHE can detect
-     * it correctly.
-     *
-     */    
+    /* for now, isolinux doesn't use cache */
     if (!cdrom) {
-        /* FIX!! 
-           I can't use __lowmem here, 'cause it will cause the error:
-           "auxseg/lowmem region collides with xfer_buf_seg" */
-        //static __lowmem char cache_buf[65536];
+        /*
+         * FIX!! I can't use __lowmem here, 'cause it will cause the error:
+         * "auxseg/lowmem region collides with xfer_buf_seg".
+         *
+         * static __lowmem char cache_buf[65536];
+         */
         dev.cache_data = core_cache_buf;
         dev.cache_size = sizeof core_cache_buf;
     } else 
@@ -146,8 +116,8 @@ void dump_dev(struct device *dev)
 
 /*
  * it will do:
- *    initialize the device structure;
  *    set up the vfs fs structure;
+ *    initialize the device structure;
  *    invoke the fs-specific init function;
  *    finally, initialize the cache
  *
-- 
2.7.4