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arch/um/os-Linux/sys-i386/task_size.c: improve a bit

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Improve this code a bit: check sigaction's return value and remove a useless
fflush().

Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: WANG Cong <wangcong@zeuux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
WANG Cong 2008-04-28 02:13:57 -07:00 committed by Linus Torvalds
parent 074a0db8e1
commit 4415d8a5aa
1 changed files with 8 additions and 4 deletions
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12
arch/um/os-Linux/sys-i386/task_size.c
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@ -88,7 +88,10 @@ unsigned long os_get_task_size(void)
sa.sa_handler = segfault;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_NODEFER;
sigaction(SIGSEGV, &sa, &old);
if (sigaction(SIGSEGV, &sa, &old)) {
perror("os_get_task_size");
exit(1);
}
if (!page_ok(bottom)) {
fprintf(stderr, "Address 0x%x no good?\n",
@ -110,11 +113,12 @@ unsigned long os_get_task_size(void)
out:
/* Restore the old SIGSEGV handling */
sigaction(SIGSEGV, &old, NULL);
if (sigaction(SIGSEGV, &old, NULL)) {
perror("os_get_task_size");
exit(1);
}
top <<= UM_KERN_PAGE_SHIFT;
printf("0x%x\n", top);
fflush(stdout);
return top;
}