From 06d9bd3ad6da2422f838fd11d5d5348fa579bdb2 Mon Sep 17 00:00:00 2001 From: Karol Swietlicki Date: Mon, 4 Feb 2008 22:30:39 -0800 Subject: [PATCH] uml: remove now unused code This patch finishes what the previous one started. The code was not used after my first patch, and now can be removed with ease. [ jdike - also deleted the #if 0 lcall stuff ] Signed-off-by: Karol Swietlicki Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/sys-i386/bugs.c | 137 ---------------------------------------- 1 file changed, 137 deletions(-) diff --git a/arch/um/sys-i386/bugs.c b/arch/um/sys-i386/bugs.c index 797945cd3d..fc99118485 100644 --- a/arch/um/sys-i386/bugs.c +++ b/arch/um/sys-i386/bugs.c @@ -12,8 +12,6 @@ #include "user.h" #include "sysdep/archsetjmp.h" -#define MAXTOKEN 64 - /* Set during early boot */ int host_has_cmov = 1; static jmp_buf cmov_test_return; @@ -46,139 +44,8 @@ static void test_for_host_cmov(void) sigaction(SIGILL, &old, &new); } -static char token(int fd, char *buf, int len, char stop) -{ - int n; - char *ptr, *end, c; - - ptr = buf; - end = &buf[len]; - do { - n = os_read_file(fd, ptr, sizeof(*ptr)); - c = *ptr++; - if (n != sizeof(*ptr)) { - if (n == 0) - return 0; - printk(UM_KERN_ERR "Reading /proc/cpuinfo failed, " - "err = %d\n", -n); - if (n < 0) - return n; - else return -EIO; - } - } while ((c != '\n') && (c != stop) && (ptr < end)); - - if (ptr == end) { - printk(UM_KERN_ERR "Failed to find '%c' in /proc/cpuinfo\n", - stop); - return -1; - } - *(ptr - 1) = '\0'; - return c; -} - -static int find_cpuinfo_line(int fd, char *key, char *scratch, int len) -{ - int n; - char c; - - scratch[len - 1] = '\0'; - while (1) { - c = token(fd, scratch, len - 1, ':'); - if (c <= 0) - return 0; - else if (c != ':') { - printk(UM_KERN_ERR "Failed to find ':' in " - "/proc/cpuinfo\n"); - return 0; - } - - if (!strncmp(scratch, key, strlen(key))) - return 1; - - do { - n = os_read_file(fd, &c, sizeof(c)); - if (n != sizeof(c)) { - printk(UM_KERN_ERR "Failed to find newline in " - "/proc/cpuinfo, err = %d\n", -n); - return 0; - } - } while (c != '\n'); - } - return 0; -} - -static int check_cpu_flag(char *feature, int *have_it) -{ - char buf[MAXTOKEN], c; - int fd, len = ARRAY_SIZE(buf); - - printk(UM_KERN_INFO "Checking for host processor %s support...", - feature); - fd = os_open_file("/proc/cpuinfo", of_read(OPENFLAGS()), 0); - if (fd < 0) { - printk(UM_KERN_ERR "Couldn't open /proc/cpuinfo, err = %d\n", - -fd); - return 0; - } - - *have_it = 0; - if (!find_cpuinfo_line(fd, "flags", buf, ARRAY_SIZE(buf))) - goto out; - - c = token(fd, buf, len - 1, ' '); - if (c < 0) - goto out; - else if (c != ' ') { - printk(UM_KERN_ERR "Failed to find ' ' in /proc/cpuinfo\n"); - goto out; - } - - while (1) { - c = token(fd, buf, len - 1, ' '); - if (c < 0) - goto out; - else if (c == '\n') - break; - - if (!strcmp(buf, feature)) { - *have_it = 1; - goto out; - } - } - out: - if (*have_it == 0) - printk("No\n"); - else if (*have_it == 1) - printk("Yes\n"); - os_close_file(fd); - return 1; -} - -#if 0 /* - * This doesn't work in tt mode, plus it's causing compilation problems - * for some people. - */ -static void disable_lcall(void) -{ - struct modify_ldt_ldt_s ldt; - int err; - - bzero(&ldt, sizeof(ldt)); - ldt.entry_number = 7; - ldt.base_addr = 0; - ldt.limit = 0; - err = modify_ldt(1, &ldt, sizeof(ldt)); - if (err) - printk(UM_KERN_ERR "Failed to disable lcall7 - errno = %d\n", - errno); -} -#endif - void arch_init_thread(void) { -#if 0 - disable_lcall(); -#endif } void arch_check_bugs(void) @@ -209,10 +76,6 @@ int arch_handle_signal(int sig, struct uml_pt_regs *regs) else if (host_has_cmov == 1) panic("SIGILL caused by cmov, which this processor claims to " "implement"); - else if (host_has_cmov == -1) - panic("SIGILL caused by cmov, couldn't tell if this processor " - "implements it, boot a filesystem compiled for older " - "processors"); else panic("Bad value for host_has_cmov (%d)", host_has_cmov); return 0; } -- 2.39.5