Kernel: Remove Limits.h

Kernel/Devices/Device.h

@@ -2,7 +2,6 @@
 
 #include <AK/Retainable.h>
 #include <AK/Types.h>
-#include "Limits.h"
 #include "FileDescriptor.h"
 
 class Process;

Kernel/Devices/FullDevice.cpp

@@ -1,5 +1,4 @@
 #include "FullDevice.h"
-#include "Limits.h"
 #include <LibC/errno_numbers.h>
 #include <AK/StdLibExtras.h>
 #include <AK/kstdio.h>
@@ -20,7 +19,7 @@ bool FullDevice::can_read(Process&) const
 
 ssize_t FullDevice::read(Process&, byte* buffer, ssize_t size)
 {
-    ssize_t count = min(GoodBufferSize, size);
+    ssize_t count = min(PAGE_SIZE, size);
     memset(buffer, 0, (size_t)count);
     return count;
 }

Kernel/Devices/NullDevice.cpp

@@ -1,5 +1,4 @@
 #include "NullDevice.h"
-#include "Limits.h"
 #include <AK/StdLibExtras.h>
 #include <AK/kstdio.h>
 
@@ -33,6 +32,6 @@ ssize_t NullDevice::read(Process&, byte*, ssize_t)
 
 ssize_t NullDevice::write(Process&, const byte*, ssize_t buffer_size)
 {
-    return min(GoodBufferSize, buffer_size);
+    return min(PAGE_SIZE, buffer_size);
 }
 

Kernel/Devices/RandomDevice.cpp

@@ -1,5 +1,4 @@
 #include "RandomDevice.h"
-#include "Limits.h"
 #include <AK/StdLibExtras.h>
 
 RandomDevice::RandomDevice()
@@ -42,7 +41,7 @@ bool RandomDevice::can_read(Process&) const
 ssize_t RandomDevice::read(Process&, byte* buffer, ssize_t size)
 {
     const int range = 'z' - 'a';
-    ssize_t nread = min(size, GoodBufferSize);
+    ssize_t nread = min(size, PAGE_SIZE);
     for (ssize_t i = 0; i < nread; ++i) {
         dword r = random_value() % range;
         buffer[i] = (byte)('a' + r);
@@ -53,6 +52,6 @@ ssize_t RandomDevice::read(Process&, byte* buffer, ssize_t size)
 ssize_t RandomDevice::write(Process&, const byte*, ssize_t size)
 {
     // FIXME: Use input for entropy? I guess that could be a neat feature?
-    return min(GoodBufferSize, size);
+    return min(PAGE_SIZE, size);
 }
 

Kernel/Devices/ZeroDevice.cpp

@@ -1,5 +1,4 @@
 #include "ZeroDevice.h"
-#include "Limits.h"
 #include <AK/StdLibExtras.h>
 #include <AK/kstdio.h>
 
@@ -19,13 +18,13 @@ bool ZeroDevice::can_read(Process&) const
 
 ssize_t ZeroDevice::read(Process&, byte* buffer, ssize_t size)
 {
-    ssize_t count = min(GoodBufferSize, size);
+    ssize_t count = min(PAGE_SIZE, size);
     memset(buffer, 0, (size_t)count);
     return count;
 }
 
 ssize_t ZeroDevice::write(Process&, const byte*, ssize_t size)
 {
-    return min(GoodBufferSize, size);
+    return min(PAGE_SIZE, size);
 }
 

Kernel/FileDescriptor.cpp

@@ -112,7 +112,7 @@ bool addition_would_overflow(off_t a, off_t b)
 {
     ASSERT(a > 0);
     uint64_t ua = a;
-    return (ua + b) > maxFileOffset;
+    return (ua + b) > OFF_T_MAX;
 }
 
 KResult FileDescriptor::fstat(stat& buffer)

Kernel/FileSystem/FileSystem.h

@@ -3,7 +3,6 @@
 #include <Kernel/Devices/DiskDevice.h>
 #include "InodeIdentifier.h"
 #include "InodeMetadata.h"
-#include "Limits.h"
 #include "UnixTypes.h"
 #include <AK/ByteBuffer.h>
 #include <AK/HashMap.h>

Kernel/FileSystem/VirtualFileSystem.h

@@ -8,7 +8,6 @@
 #include <AK/Function.h>
 #include "InodeIdentifier.h"
 #include "InodeMetadata.h"
-#include "Limits.h"
 #include "FileSystem.h"
 #include <Kernel/KResult.h>
 

Kernel/Limits.h

@@ -1,9 +0,0 @@
-#pragma once
-
-#include "UnixTypes.h"
-
-inline static const off_t maxFileOffset = 2147483647;
-
-static const ssize_t GoodBufferSize = 4096;
-
-

Kernel/UnixTypes.h

@@ -255,7 +255,8 @@ struct sigaction {
 #define SIG_UNBLOCK 1
 #define SIG_SETMASK 2
 
-// FIXME: Support 64-bit offsets!
+#define OFF_T_MAX 2147483647
+
 typedef signed_dword off_t;
 typedef dword time_t;