[U-Boot] U-boot does not silence its output

[mrigendra]

I have this uboot

    VERSION = 2017
    PATCHLEVEL = 03

I am trying to silent the console using the silent variable.I defined this
`#define CONFIG_SILENT_CONSOLE`
So at boot time I am interrupting the console, and entering

    setenv silent 1
    save
    reset

Now after reset, or power on reset I try again get console logs.After seeing
env variables

    printenv

I see my saved variable correctly in env varibles

    silent=1

but still u-boot is not silent. I suspect this function is failing at
checking for this env variable,

        char *getenv(const char *name)
    {
    	if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
    		ENTRY e, *ep;
    
    		WATCHDOG_RESET();
    
    		e.key	= name;
    		e.data	= NULL;
    		hsearch_r(e, FIND, &ep, &env_htab, 0); /*this function is maybe
returning*/
    
    		return ep ? ep->data : NULL;
    	}
    
    	/* restricted capabilities before import */
    	if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
    		return (char *)(gd->env_buf);
    
    	return NULL;
    }

But what exactly is happening?
Is there something like before relocation time env variables and after
relocation env variables because the function,

    static void console_update_silent(void)
    {
    #ifdef CONFIG_SILENT_CONSOLE
    	if (getenv("silent") != NULL){
    		puts("silent");
    		gd->flags |= GD_FLG_SILENT;
    	}
    	else{
    		puts("Non silent");
    		gd->flags &= ~GD_FLG_SILENT;
    	}
    #endif
    }
    
    /* Called before relocation - use serial functions */
    int console_init_f(void)
    {
    	gd->have_console = 1;
    
    	console_update_silent();
    
    	print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
    	
    	return 0;
    }

`console_init_f` says its before relocation.
I have put some prints to see and always gets non silent, even if I have
saved the silent variable,

I am using a sd card to boot(mmc), I don't have any debugger, so I
I tried printing default environment, as

    env print default
    ## Error: "default" not defined

So there is not default environment too.

Any tips or help will make me understand.

P.S.

I explicitly defined silent in `#define CONFIG_EXTRA_ENV_SETTINGS`
Now u-boot is silent.

Doing a `setenv silent` should remove this from env variable, and I can see
that its gone, but still on reboot my uboot is silent. 
So something about environment variable is clearly mystery to me.



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